Product Reviews and Information for Flu
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CL Answer
Flu Vaccines: How do different flu vaccines compare and which is best for older people?
Learn how flu vaccines differ and find out which may be most suitable for older people, as well as those with egg allergy.
CL Answer
Do any supplements help for flu?
Which supplements may help prevent or reduce symptoms of colds or the flu, including vitamin D, ginseng, NAC, and elderberry.
Product Review
Elderberry Supplements Review
Find the Best Elderberry Supplement. Tests and Reviews of Popular Elderberry Supplements & CL's Top Picks.
CL Answer
At-Home COVID Tests: How They Compare and What You Need to Know
Coronavirus (COVID-19) Tests: Where to get COVID-19 tests, including information about free testing, home testing and more. Information about SARS-CoV-2 virus tests, antibody tests and FDA authorized tests.
CL Answer
Can green tea help prevent the flu?
Find out if green tea can help with your cold & flu symptoms - drinking, gargling or taking supplements. ConsumerLab.com's answer explains.
CL Answer
What is EpiCor? Does it really "boost" the immune system and prevent colds?
EpiCor supplement info, including evidence from clinical studies on immune function and cold/flu prevention, safety, and price.
CL Answer
How do the COVID-19 vaccines compare in terms of efficacy, safety and side effects? How, when and where do I get the COVID-19 vaccine?
Find out how the COVID-19 vaccines from Pfizer and Moderna compare and learn how when and where you can get the COVID-19 vaccine.
CL Answer
Do any supplements help prevent or treat a cold?
Are there supplements that can help prevent or treat cold symptoms? Learn more about zinc, probiotics, vitamin C and more.
Product Review
Probiotic Supplements Review (Including Pet Probiotics)
Probiotics: See What They Really Contain and Our Top Picks
Recalls & Warnings
December 15, 2022
Beware of Supplements, Homeopathic Products Promoted to Treat Flu, Says FDA
On December 13, 2022, the FDA warned consumers to beware of supplements and homeopathic products, as well as nasal sprays, sanitizers and other products that promise to prevent or treat the flu.
CL Answer
How are you staying healthy during the coronavirus pandemic?
Tips for staying healthy during the coronavirus (COVID-19) pandemic. Tips from ConsumerLab members for maintaining physical health, mental health and social well-being during COVID-19.
Product Review
Ginseng Supplements Review
Find the Best Ginseng Supplement. Key "Ginsenosides" Found to Range 10-Fold Across Products.
Clinical Update
7/12/2022
Allergic to Flu Vaccine
Some people are allergic to neomycin, an ingredient in some flu vaccines. Find out which flu vaccines contain neomycin and which don't. Also learn which flu vaccines are preferred for people 65 and older.
Clinical Update
9/11/2021
Flu Vaccine & COVID
Learn if you need to time your flu vaccine around your COVID vaccine and how the flu vaccine may affect you if you later get COVID. Also find out when kids should get a flu shot.
Clinical Update
12/21/2021
This Year’s Flu Shot a “Bad Match?”
The 2021-2022 flu shot may be less effective against the currently dominant flu strain, but there is still good reason to get a shot, according to a recent study. Get the details in our updated article about Flu Vaccines.
Product Review
NAC (N-Acetyl Cysteine) Supplements Review
Choose the Best N-Acetyl Cysteine Supplement. See Our Tests of Popular NAC Supplements and Top Picks for Quality and Value.
Product Review
Green Tea Review: Tea Bags, Matcha Powders, and Supplements
Some green teas provide barely any green tea polyphenols, while some others are high strength. See the Test Results and Our Top Picks for Green Tea.
Product Review
Echinacea Supplements Review
Many Echinacea Supplements Fail CL's Tests. Make Sure You Know What You're Getting!
CL Answer
Does AHCC (active hexose correlated compound) have anticancer or antiviral benefits, and is it safe?
Learn about AHCC (active hexose correlated compound), including whether it is beneficial for liver, pancreatic, or prostate cancer, chemotherapy-related side effects, or the flu, and if it is safe.
CL Answer
What is monolaurin? Can it really prevent colds, cold sores, or other infections?
Lauricidin (monolaurin) information for preventing colds, immune system function, and safety.
CL Answer
Do any supplements help with COVID-19? Do supplements like vitamin D, zinc, vitamin C, or herbals work?
Find out if natural remedies & supplements for coronavirus such as zinc, vitamin C, garlic, or elderberry help to prevent or treat COVID-19.
Clinical Update
10/22/2021
Flu Vaccine for Transplant Recipients?
Find out if transplant recipients should consider getting a specific type of flu shot.
Clinical Update
10/22/2021
Where to Get a Flu Shot
Find out where you can get specific flu shots and learn how much the shots cost.
Clinical Update
9/28/2021
COVID + Flu Shot Timing
Find out if you can get a flu shot and COVID-19 shot at the same time and how this may affect side effects.
Clinical Update
9/28/2021
Flu Shot and Risk of COVID Complications
Getting a flu shot may actually reduce the risk of serious complications if you get COVID-19.
Clinical Update
11/15/2021
Flu & COVID Vaccines
Additional research indicates that it's safe to get flu and COVID-19 vaccines together. Get the details.
Clinical Update
7/08/2024
EpiCor for Colds and Flu?
Did taking EpiCor, a "postbiotic" supplement, reduce cold and flu symptoms when given during cold and flu season? Find out what a recent study showed in the Postbiotics section of our Probiotic Supplements Review.
Also see: Do any supplements help prevent or treat a cold?
Clinical Update
11/01/2024
COVID and Flu Home Tests Compared
There are now 38 different COVID-19 home antigen tests (7 that also test for flu), but we found big differences in how well they detect COVID (ranging from 59.7% to 96.6% sensitivity) and avoid false negatives. See our comparison chart and learn our Top Picks for testing for COVID and COVID/Flu.
Also, every U.S. household is now eligible to get 4 at-home COVID-19 tests. Find out how (unfortunately, you can’t choose the brand).
CL Answer
Mullein Tea: Possible Health Effects and Safety
Mullein tea is often promoted for relieving symptoms of lung conditions, including coughing, hoarseness, sore throat, and shortness of breath. Find out if there is evidence to support these uses, and learn about possible side effects of mullein.
CL Answer
What is the difference between cysteine and cystine?
Find out the difference between cysteine and cystine amino acids, including where each is found and their functions.
CL Answer
What are the health benefits of green tea, and is it safe?
ConsumerLab explains green tea's potential health benefits for everything from fighting cancer to helping your heart.
CL Answer
Is liposomal vitamin C (sold as Lypo-Spheric) better than other forms of vitamin C?
Liposomal vitamin C information, including absorption facts and current evidence.
Clinical Update
7/19/2022
COVID + Flu Vaccines
Getting a COVID-19 vaccine along with a flu shot seems to slightly increase the risk of side effects, according to a recent study. Get the details.
Clinical Update
6/28/2022
Flu Vaccine Recommendations for Seniors
An advisory panel for the CDC has updated its recommendations about which flu vaccines are preferred for people 65 and older. Get the details.
Clinical Update
11/05/2021
Flu Shot + COVID Booster?
Find out if it's okay to get a flu shot at the same time as a COVID booster based on recent evidence.
Clinical Update
5/25/2021
Ginger for Stomach Flu?
Can ginger extract reduce vomiting due to stomach flu? See what a new study found in the What It Does section of the Ginger Supplements Review. Also see our Top Picks among ginger supplements, chews, and spices.
Clinical Update
2/16/2017
Vitamin D Reduces Risk of Colds & Flu
A study released today shows that taking vitamin D in a certain way reduces the risk of cold and flu infections by up to 70%. The benefits are greatest for people very deficient in vitamin D. For details, see the "What It Does" section of the Vitamin D Supplements Review (which includes our tests of products) >>
Clinical Update
8/21/2020
Can a Multivitamin Reduce Colds and Flu?
Can regularly taking a multivitamin reduce the chance of getting a cold or flu, or lessen the symptoms and duration of illness among older people? Find out what a recent study showed in the What They Do section of the Multivitamin and Multimineral Supplements Review. Also see our Top Picks among multivitamins for women, men, seniors, children and pets.
Clinical Update
9/22/2020
Does Elderberry Help With Flu Symptoms?
Did giving Sambucol (an elderberry extract) to people diagnosed with flu reduce the severity or shorten the duration of symptoms? Find out what a recent study showed in the What It Does section of our Elderberry Supplements Review. Also see our Top Picks among elderberry supplements.
Clinical Update
1/15/2021
Vitamin D for Colds and Flu?
Does monthly high-dose vitamin D help prevent colds and flu or lessen symptoms in older people? Find out what a recent study showed in the What It Does section of our Vitamin D Supplement Review. Also, see our Top Pick for vitamin D.
CL Answer
Does osha root have health benefits and is it safe?
Osha root extracts are commonly promoted for congestion, coughs, throat irritation, and other uses. Find out if research supports these uses, and learn if osha root is safe.
Recalls & Warnings
March 23, 2023
FDA Warns Herbal Vitality for Promoting Supplements to Treat Cold & Flu, Kidney Stones & More
On March 7, 2023, the FDA issued a warning letter to Herbal Vitality, Inc.
CL Answer
Have you heard of the probiotic, Keybiotics? Does it do what it claims, and is it worth the money they charge?
Whole Body Research Keybiotics probiotic information, including its ingredients and possible cheaper alternatives.
Clinical Update
12/04/2017
What NAC (N-Acetylcysteine)
NAC is both a supplement and a drug used to treat conditions ranging from flu and chronic bronchitis to compulsive behavior. A recent study evaluated its use in preventing kidney injury during angiography (imaging of blood vessels). Get the results and learn more in the "What It Does" section of the NAC (N-Acetylcysteine) Supplements Review >> Also see our top choices among NAC supplements.
Clinical Update
1/28/2022
CBD To Reduce COVID Risk?
Use of a prescription formula was associated with lower risk of COVID-19 infection in a recent analysis, but there are important caveats to this finding. Get the details in the Colds, Flu, and Viral Infections section of our Review.
Clinical Update
9/26/2024
Vitamin D to Prevent Winter Colds & Flu?
Does taking vitamin D help prevent respiratory infections during winter? Find out what a recent study showed in the Respiratory infections, colds and influenza section of our Vitamin D Supplements Review, which includes our Top Picks.
Clinical Update
10/10/2024
Top Pick for Hand Soap
As cold and flu season begins to pick up, people may find themselves washing their hands more often to help avoid getting sick. Find out which liquid hand soap is our Top Pick for avoiding irritation, and learn why we don’t prefer foaming hand soaps.
Also see our Top Pick bar soap and body wash.
Clinical Update
10/18/2024
Wellness Formula for Colds?
The product Wellness Formula by Source Naturals is said to support the immune system to help people avoid sick days. Is there evidence of that? Find out in our article about supplements for colds.
Also see: Do any supplements help for flu?
Clinical Update
10/21/2024
Benefits of Mullein Tea?
What is mullein tea and does it really reduce coughing, or help ward off the flu or other viruses? Find out in our new article about the potential health benefits and safety of mullein tea.
Also see our Green Tea Review, including our Top Picks.
CL Answer
Is it true that NAC can help clear nasal passages?
Find out if N-Acetyl Cysteine (NAC) can help with post nasal drip & general sinus congestion and about supplements that may reduce cold symptoms.
Product Review
L-Lysine Supplements Review
Read L-Lysine Labels Carefully. Some Can Fool You.
CL Answer
Is ingesting colloidal silver helpful for any condition and is it safe to use?
Find out if there is evidence showing colloidal silver can help to treat infections, boost the immune system, help with arthritis and more, plus find out if colloidal silver can cause blue skin or other side effects.
CL Answer
Is it safe to fly and how can I avoid getting COVID when flying?
How to fly safely and avoid COVID-19. Tips to help you stay safe and protect others while flying during the COVID-19 pandemic.
CL Answer
What are the health benefits of amla and is it safe?
Learn about amla (Indian gooseberry), including its potential health benefits and possible safety concerns.
Recalls & Warnings
February 21, 2013
FDA and FTC Warn: Supplements Cannot Prevent, Treat Or Cure Cold And Flu
On February 11, 2013, the FDA and the Federal Trade Commission (FTC) jointly issued warning letters to three dietary supplement companies regarding their potential illegal marketing of products to prevent, treat or cure flu virus.
Recalls & Warnings
December 29, 2022
EarthLab, Inc. Warned for Promoting Curcumin, Elderberry to Treat Pain & Flu
On November 10, 2022, the FDA issued a warning letter to EarthLab, Inc., dba Wise Woman Herbals following inspection of the company’s website which found statements about the company’s products to be drug claims because they suggest the products can prevent or treat disease.
Recalls & Warnings
May 18, 2023
EarthLab, Inc. Warned for Promoting Green Tea, Curcumin, Elderberry & More to Treat Stroke, Cancer & Flu
On April 27, 2023, the FDA issued a warning letter to EarthLab, Inc., dba Wise Woman Herbals, following inspection of the company’s website which found statements about the company’s Green Tea Solid Extract, Curcuma Spp.
Recalls & Warnings
September 01, 2022
FDA Warns Elderberry Fair & Co for Promoting Elderberry Supplements and Apple Cider to Treat Colds & Flu
On August 15, 2022, the FDA issued a warning letter to The Elderberry Fairy & Co., LLC after review of the company’s website found statements about the company’s Elderberry Syrup with Honey, Elderberry Syrup with Agave, and Organic Fire Cider to be drug claims.
Recalls & Warnings
November 28, 2022
Seller of Elderberry, Tea Warned for Claims of Treating Cold, Flu, Cancer
On October 18, 2022, the FDA issued a warning letter to Rosebud’s Ranch and Garden, LLC after inspection of the company’s website and social media found statements about the company’s Domestic Divas – Colds and Flu (Tea), Domestic Divas - No Pain No Gain Tea, Green ...
CL Answer
What are the health benefits of bovine colostrum and is it safe?
Bovine colostrum is promoted for boosting immunity, preventing and treating diarrhea, and improving gut health, but does it really work? See the clinical evidence for bovine colostrum, including doses that have been used, as well as safety concerns, cost considerations, and the difference between regular bovine colostrum and hyperimmune bovine colostrum.
Recalls & Warnings
February 02, 2023
DoTerra Sellers Ordered to Pay $15,000 for Deceptive COVID-19 Claims
On January 30, 2023, the website truthinadvertising.org reported that the U.S.
Product Review
Apple Cider Vinegar Review — Bottled Liquids and Supplements
Find the Best Apple Cider Vinegar. See Which Apple Cider Vinegar Liquids and Supplements Passed Our Tests of Quality.
Product Review
Ginger Supplements, Chews & Spices Review
Tests Reveal Best and Worst Ginger Supplements & Spices. Poor Quality and Lead Contamination Discovered in Some Products.
CL Answer
What are the health benefits of nutritional yeast and is it safe?
Learn about the nutritional content and health benefits of nutritional yeast (nooch), evidence for or against nutritional yeast for boosting the immune system, lowering cholesterol and blood sugar, plus safety and side effects of nutritional yeast.
News Release
March 12, 2020
ConsumerLab Tests Reveal Big Differences Among Elderberry Supplements
White Plains, New York, March 12, 2020 — Elderberry extracts have long been promoted for fighting colds and flu, and, more recently, as a natural remedy for coronavirus (COVID-19).
Recalls & Warnings
January 04, 2024
Lone Star Botanicals Warned by FDA for Manufacturing Violations
On November 26, 2023, the FDA issued a Warning Letter to Lone Star Botanicals, Inc.
Recalls & Warnings
February 01, 2022
Complaint Submitted to FTC for doTerra Essential Oil COVID Claims
On January 28, 2022, the website truthinadvertising.org submitted a complaint to the Federal Trade Commission (FTC) against doTerra International, LLC. following a series of Zoom calls from the company titled "Protocols for the Current Climate.
Recalls & Warnings
February 09, 2022
FDA Warns Seller of Colloidal Silver Eye Drops, Copper Products & More
On February 1, 2022, the FDA issued a warning letter to New Earth Healing Essentials, LLC d/b/a 5D Full Disclosure following a review of the company’s website, which found statements made about some of the company's products, including Plasma Colloidal Silver Eyedrops, Gaia’s ...
Recalls & Warnings
December 14, 2023
FDA Warns Seller of Novid NASAL SPRAY for Allergy, Virus, and Cold Claims
On December 7, 2023, the FDA issued a warning to Novid Group, Inc. following an inspection of the company’s website, which found statements about the company’s novid NASAL SPRAY product to be drug claims.
Recalls & Warnings
April 25, 2024
Yogi Tea Recalled Due to Pesticides
On April 19, 2024, Yogi Tea issued a recall of over 54,800 packs of Yogi Echinacea Immune Support tea after a sample of echinacea tested above acceptable limits for multiple pesticides. No illnesses have been reported to date.
Recalls & Warnings
June 13, 2024
Thyroid Supplement Recalled Due to Salmonella
On June 11, 2024, Penn Herb Company Ltd issued a recall of 51 bottles of Nature’s Wonderland Thyroid Formula capsules after FDA testing revealed the products to be contaminated with Salmonella.
Product Review
CBD Oils, Softgels, Gummies, Creams & Salves Review
See How Much CBD and THC We Found in Products.
Recalls & Warnings
June 05, 2020
Seller of CBD, Sleep Aids, and Cold & Flu Products Warned for Manufacturing Violations
On April 28, 2020, the FDA issued a warning letter to The Dragontree Apothecary LLC, which found the company's Sleep Support, Anxiety Relief, Cold & Flu Relief, and Inflammation Relief to be adulterated because they were prepared, packed, or held under conditions that ...
Recalls & Warnings
December 31, 2020
FDA Warns Seller of Flu Immune
On December 21, 2020, the FDA issued a warning letter to Riverstone LLC for selling the products Flu Immune Drops, L-Lysine, Lysine Extra, and Monolaurin with unsupported claims that they can treat coronavirus (COVID-19).
Recalls & Warnings
November 09, 2023
FDA Warns Biorica International for Cholesterol, Kidney & Cancer Claims
On August 4, 2023, the FDA issued a Warning Letter to Biorica International Corp. following review of the company’s websites and social media, which found statements about the company’s Plaquex Oral Supplements to be drug claims, which are not permitted for dietary supplements.
Recalls & Warnings
May 04, 2023
FDA Warns MedoLife for Promoting Homeopathic Products to Treat COVID-19, Cancer
On April 19, 2023, the FDA issued a warning letter to Medolife Rx D/B/A MedoLife Corp., AELIA Inc. and Queanta Inc.
Recalls & Warnings
March 01, 2023
Seller of Dr. Miller’s Herbal “Detox” Teas Warned by FDA for Drug Claims
On February 3, 2023, the FDA issued a warning letter to Jackson Health & Wellness Clinic after inspection of the company’s website found statements about the company’s Dr. Miller’s Holy Tea, Dr. Miller’s Super Holy Tea, Dr. Miller’s Ultimate Tea, Dr.
Recalls & Warnings
May 24, 2023
Seller of Echinacea, High Blood Pressure Products & More Warned for Drug Claims
On May 12, 2023, the FDA issued a warning letter to H.E.A.L.
Recalls & Warnings
June 19, 2023
A&Z Pharmaceutical Warned for Promoting Calcium & Vitamin D for Hair Loss, Osteoporosis & Cancer
On June 1, 2023, the FDA issued a warning letter to A&Z Pharmaceutical, Inc. following inspection of the company’s website and social media, which found statements about the company’s Chewable Calcium 600MG with Vitamin D for Kids in Orange Flavor products to be drug claims.
Recalls & Warnings
August 16, 2023
FDA Warns Sellers of Homeopathic Products for Infants and Children
On August 9, 2023, the FDA issued a warning letter to ALVA-AMCO Pharmacal Companies, LLC and CalmCo LLC, previously named Ketomi LLC, following a review of the company websites, which found statements about company homeopathic products to be drug claims because they are intended to diagnose, cure, ...
Recalls & Warnings
December 12, 2022
FDA Warns Saffron USA for Promoting Teas to Treat Insomnia, Osteoporosis & Cancer
On September 23, 2022, the FDA issued a warning letter to Saffron USA LLC following inspection of the company’s website which found statements about its Allergy Blend, Chamomile Tea Petals, Diabetic Support Blend, Orange Blast Tea, and Saffron Loose Tea products to be drug ...
CL Answer
Does heat kill coronavirus (COVID-19)? Can it disinfect face masks and packages?
Find out if heat kills the coronavirus SARS-CoV-2 that causes COVID-19 infection. Learn what temperature kills the coronavirus and more. ConsumerLab explains.
Recalls & Warnings
November 03, 2022
Seller of CBD Warned for COVID-19 Claims
On November 1, 2022, the FDA issued a warning letter to Alternative Health Distribution LLC (d/b/a CannaAid) following a review of the company’s website, which found statements about the company’s cannabidiol (CBD) products to be drug claims.
Recalls & Warnings
February 06, 2023
FDA Warns Companies Promoting Products to Treat Monkeypox, COVID-19, & Other Viruses
On January 30, 2023, the FDA issued a warning letter to four companies following review of the company websites, which found statements about company products to be drug claims because they were promoted to mitigate, prevent, treat, diagnose, or cure viruses such as monkeypox.
Recalls & Warnings
December 05, 2018
Seller of Cold and Flu Supplements, "SuperFood" & More Warned by FDA
On October 30, 2018, the FDA issued a warning letter to American Botanical Pharmacy following a review of the company's website (www.herbdoc.com) and Facebook page, which found statements made about some of its products to be drug claims.
Recalls & Warnings
January 30, 2013
Maker of Cold and Flu Supplement Warned For Making Drug Claims
On January 24, 2013, the FDA and FTC jointly issued a warning letter to Flu and Cold Defense LLC, after a review of the company's website and marketing materials found statements made about the cold and flu dietary supplement GermBullet to be drug claims.
News Release
March 04, 2020
CBD Most Often Used for Pain, Then Sleep, According to CL Survey. Half of Users Think It Works.
White Plains, New York, March 4, 2020 — A recent survey of 9,782 people who use dietary supplements found that 14.5% of respondents purchased CBD (or hemp extract, which is a source of CBD) in 2019. The survey asked those people what they used CBD for and whether or not they thought it worked.
News Release
March 11, 2019
Best NAC (N-acetyl cysteine) Supplements Identified by ConsumerLab
White Plains, New York, March 11, 2019 — NAC (N-acetyl cysteine) supplements are promoted for many uses, including "liver support," "immune support," and reducing symptoms of the flu and flare-ups of chronic bronchitis.
Recalls & Warnings
June 05, 2020
LifeHealth Science Warned for Manufacturing Violations
On May 15, 2020, the FDA issued a warning letter to LifeHealth Science, which found the company's ORËÁ product to be adulterated because it was prepared, packed, or held under conditions that violate Current Good Manufacturing Practices for dietary supplements.
Recalls & Warnings
July 22, 2022
FDA Warns Seller of Vision, Calcium & Magnesium Supplements and More
On June 14, 2022, the FDA issued a warning letter to New Sun Inc. following inspection of the company’s website which found statements about the company’s products to be drug claims.
Recalls & Warnings
September 28, 2022
FDA Warns Muscle Sports for Joint Health, Immune & Workout Supplement, Vitamin C, Elderberry, and Other Claims
On September 23, 2022, the FDA issued a warning letter to Muscle Sports Products, LLC following inspection of the company’s websites which found statements about company products, including Join Revolution Capsules, IMMUNITY + Powder, Rhino Rampage PUMPED Capsules, Attack Pre-Workout ...
Recalls & Warnings
February 02, 2021
FDA Warns Seller of Ginger, Echinacea, and More
On December 10, 2020, the FDA issued a warning letter to Prairie Dawn Herbs following a review of the company's website, which found statements made about the company's products Chest Tea, Ginger Oil, Dandelion root Tincture, Echinacea purpurea Tincture, Antispasmodic Tincture, ...
Recalls & Warnings
January 12, 2021
FDA Warns Seller of Turmeric, Ashwagandha, Glucosamine, and More
On December 18, 2020, the FDA issued a warning letter to Reddy Naturals following a review of the company's website, which found statements made about the company's products Glycostasis, Glucosamine Curcumin, Turmeric 50, Turmeric Curcumin, Cetyl Curcumin, Ashwagandha, Huruli, ...
Recalls & Warnings
September 05, 2013
Seller of Herbal Supplements and "Tonics" Warned For Manufacturing Violations and Drug Claims
On May 24, 2013, the FDA issued a warning letter to Sundial Herbal Products following a facility inspection which found the company's products, including Woman Back Tonic, Koromantee, Wood and Root Tonic, Arthritis, Asthma, Diabetics, Sundial Ashanti Weight Loss Energy Lifter, Appetite Suppresser, ...
CL Answer
Do any supplements help with restless legs syndrome?
Find out whether supplements or vitamins like iron, magnesium, vitamin E and others can help for restless leg syndrome (RLS). ConsumerLab.com's answer explains.
CL Answer
Is it possible to take too much vitamin C?
Find out the daily value of vitamin C, along with possible side effects of excessive vitamin C intake. ConsumerLab explores the topic of proper vitamin C supplement usage, and why taking too much can be harmful.
Recalls & Warnings
February 20, 2013
Cold, Flu and Stress Supplement Company Warned For Adulteration, Drug Claims And More
On October 5, 2012, the FDA issued a warning letter to dietary supplement manufacturer Wholistic Herbs, Inc. following a facility inspection which found the company's products, including At-Ease, Morning Calm, Aller-Ban, Stomach Flu, Kold & Koff, Kold Sore, and L.
News Release
May 02, 2018
Best Probiotic Supplements and Kombuchas? -- ConsumerLab Tests 41 Popular Products, Reveals Problems and Top Picks
White Plains, New York, May 2, 2018 — With so many different probiotic supplements on the market, each providing different amounts and strains of beneficial bacteria or yeast, choosing the right one can be an overwhelming task.
Recalls & Warnings
December 17, 2020
FTC Crackdown on Six Deceptive CBD Products
On December 17, 2020, the FTC announced that it is taking action against six companies for selling CBD products with unsupported and deceptive health claims that they can treat a variety of conditions, including cancer, heart disease, hypertension, Alzheimer's disease, and others.
Recalls & Warnings
July 10, 2020
Sundial Herbal Recalls More Than Sixty Products Including Turmeric, Cinnamon & Tea
On July 9, 2020, Sundial Herbal Products issued a recall of more than 60 herbal products because they were misbranded and/ or promoted with drug claims. Their labels contain drug claims stating the products can diagnose, cure, mitigate, treat, or prevent disease.
Recalls & Warnings
April 17, 2020
Earth Angel Oils Warned for Coronavirus Claims
On April 14, 2020, the FDA issued a warning letter to Earth Angel Oils for selling products with unsupported claims that they can treat coronavirus (COVID-19).
Recalls & Warnings
April 14, 2020
Teami Tea Settles Charges of Unproven Claims and Deceptive Celebrity Endorsements
On March 6, 2020, the FTC announced that Teami, LLC, a marketer of tea and skin care products, agreed to settle charges that it was selling products with unproven claims and misleading celebrity endorsements.
Recalls & Warnings
December 10, 2019
Poisoning from Essential Oils Increasing
Poisonings from essential oil ingestion increased by 16.3% in Australia over a 4-year period, according to a study recently published in the Medical Journal of Australia. The researchers also noted reports of increased frequency and/or severity of essential oil poisonings in the U.S.
Recalls & Warnings
June 02, 2020
Sundial Herbal Ordered to Halt Distribution of Products
On June 1, 2020, a New York federal judge filed an order against two individuals doing business as Sundial Herbal Products to stop the company from distributing its products, which were found to be misbranded and promoted as drugs.
Recalls & Warnings
October 06, 2020
FDA Warns Seller of Red Yeast Rice, Vitamin D, Blood Pressure Supplements, and More
On August 28, 2020, the FDA issued a warning letter to Dr. Sam Robbins, Inc.
Recalls & Warnings
July 14, 2020
Sellers of Miracle Mineral Solution Criminally Charged With Making Coronavirus Claims
On July 8, 2020, federal prosecutors charged the sellers of Miracle Mineral Solution, a toxic bleach solution marketed as a cure for coronavirus (COVID-19), with conspiracy to defraud the United States, conspiracy to violate the Federal Food, Drug and Cosmetic Act, and criminal contempt.
Recalls & Warnings
May 23, 2020
FTC Warns 50 More Companies for Coronavirus Claims
On May 21, 2020, the FTC announced that it sent warning letters to 50 companies for selling products such as herbal products, immune system boosters, and vitamin C, with unsupported claims that they can treat coronavirus (COVID-19).
Recalls & Warnings
June 04, 2020
FTC Warns 35 More Companies for Coronavirus Claims
On June 4, 2020, the FTC announced that it sent warning letters to 35 companies for selling products such as herbal products, immune system boosters, and vitamin C with unsupported claims that they can treat coronavirus (COVID-19).
News Release
December 09, 2014
Round-up of Recent Product Tests by ConsumerLab.com -- Results for B Vitamin Supplements & Energy Drinks, Garlic, NAC (N-acetyl cysteine), Iron and Omega-7 Fatty Acids
White Plains, New York, December 9, 2014 — In recent months, ConsumerLab.com has published test results for a variety of popular supplements, including B vitamins supplements and energy drinks, NAC (N-acetyl cysteine), iron and garlic. In addition, ConsumerLab.
Recalls & Warnings
August 12, 2019
Miracle Mineral Solution Is Dangerous, Warns FDA
On August 12, 2019, the FDA warned consumers not to buy or use Miracle Mineral Solution or other "Miracle" or "Master" solution products containing sodium chlorite because they can dangerous and even life-threatening reactions.
Recalls & Warnings
July 27, 2019
Herbal Doctor Remedies Recalls 43 Products
On July 24, 2019, Herbal Doctor Remedies issued a recall of 43 Chinese herbal medicines, including Bone Fixer, Lipidtrol, Pain Away, Prostatin, Stomach Flu and others, because they were marketed without FDA approval and were manufactured outside of the controls required by current Good ...
Recalls & Warnings
September 08, 2018
Homeopathic Oral Sprays Recalled Due to Possible Bacterial Contamination
On September 5, 2018, Beaumont Bio Med, Inc., issued a recall of all of its water and alcohol-based homeopathic products because they have the potential to contain microbial contaminants.
Recalls & Warnings
May 03, 2013
Homeopathic Company Warned For Drug Claims and Improper Labeling
On March 12, 2013, the FDA issued a warning letter to Natural Medicine Associates, Inc.
Recalls & Warnings
March 08, 2016
Seller of Echinacea Warned Manufacturing Violations, Drug Claims
On February 25, 2016, the FDA issued a warning letter to Herbal Energetics/ In Joy Organics, following a facility inspection which found the company's product, X Out-Rays to be adulterated because it was prepared, packed, or held under conditions that violate Current Good ...
Recalls & Warnings
September 26, 2014
Seller Warned for Promoting Essential Oils to Treat Flu, MRSA, Measles and More
On September 22, 2014, the FDA issued a warning to doTERRA International, LLC.
Recalls & Warnings
October 18, 2017
FDA Warns Seller of Arthritis, Blood Pressure, Diabetes Supplements For Making Drug Claims
On August 15, 2017, the FDA issued a warning letter to Years to Your Health, Inc., following an inspection of the company's website which found a number of their products to be misbranded, as they contained drug claims.
Recalls & Warnings
June 07, 2013
Maker of Colloidal Silver and Mushroom Extract Supplements Warned For Manufacturing Violations and Drug Claims
On May 2, 2013, the FDA issued a warning letter to Earthborn Products, Inc.
Recalls & Warnings
June 13, 2013
Seller of Cardio, Immune, Greens Supplements and More Warned For Drug Claims
On May 29, 2013, the FDA issued a warning letter to dietary supplement company Nature's Answer, following a review a the company's website, www.naturesanswer.
Recalls & Warnings
June 26, 2015
Seller of CoQ10, Anxiety Supplements and More Warned for Manufacturing Violations, Drug Claims
On June 6, 2015, the FDA issued a warning letter to Country Doctor Herbals, following a facility inspection which found the company's products, including Herbal Flu Be-Gone, Herbal Multi-Bac, Herbal Nervine, Herbal Pain-A-Way, Herbal Pancreas, Herbal Parasite Cleanse, Herbal Perfect ...
Recalls & Warnings
June 05, 2018
FDA Warns Seller of Colloidal Silver
On May 17, 2018, the FDA issued a warning letter to Silver Armor, Inc.
Recalls & Warnings
May 06, 2014
Seller of Flaxseed, Ginkgo and More Warned for Manufacturing Violations and Drug Claims
On April 18, 2014, the FDA issued a warning letter to Iowa Select Herbs, LLC, following a facility inspection which found the company's products, including Flax Seed, Holy Basil, Papaya Leaf Extract, and Ginkgo Leaf Extract products, to be adulterated because they were prepared, packed, or held ...
Recalls & Warnings
April 12, 2013
Zicam Advised Against Using Cold Prevention Claim In Advertising
On April 5, 2013, it was reported that the National Advertising Division (NAD) recommended that Matrixx Initiatives, maker of Zicam cold products, stop making claims in its advertising that the product can prevent colds.
Recalls & Warnings
August 29, 2012
Herbal Supplement Company Warned For Medical Claims
On August 2, 2012, the FDA issued a warning to HSAC Enterprises, Inc. dba Kare-N-Herbs subsequent to a facility inspection and website review in May 2012 which found statements made about Kold Kare, Energy Kare and Tranquility Kare dietary supplements to constitute drug claims.
Recalls & Warnings
February 11, 2012
Herbal Sprays for Colds and Cold Sores Recalled
On February 10, 2012 the U.S. FDA posted a notice announcing the recall of all "Koff & Kold" and "Kold Sore" sprays by Wholistic Herbs Inc. The products were distributed throughout the United States.
Recalls & Warnings
August 30, 2012
Supplement Company Warned For Medical Claims and Misbranding Of Omega-3, CoQ10, Noni Juice And More
On July 12, 2012, the FDA issued a warning letter to Alfa Vitamins Laboratories, Inc.
Recalls & Warnings
January 11, 2013
Consumers May Be Eligible For Cold, Allergy and Weight Loss Supplement Refunds
On January 7, 2013, the Federal Trade Commission (FTC) announced that consumers who purchased the Iovate Health dietary supplements Accelis, nanoSLIM, Cold MD, Germ MD, or Allergy MD between January 2006 and July 2010 may qualify for a refund.
Recalls & Warnings
November 14, 2012
Maker of Vitamin C, Aloe and Sexual Enhancement Supplements Warned for Drug Claims and Misbranding
On October 22, 2012, the FDA issued a warning letter to Health Breakthroughs International, LLC after a review of the company's product labels and website found the dietary supplements Amazing C, MPS-Gold 100 and Power Herbal Formula to be promoted as drugs.
Recalls & Warnings
October 17, 2012
Herbal Supplement Company Warned For Manufacturing Violations and Drug Claims
On October 2, 2012, the FDA issued a warning letter to Amazing Herbs Nutraceuticals following a facility inspection which found violations of Current Good Manufacturing Practices (CGMPs) for dietary supplements.
Recalls & Warnings
July 05, 2012
FDA Warns Good Herbs Inc. of Manufacturing Violations and Drug Claims
The FDA issued a warning letter to Good Herbs Inc. on May 24, 2012, after a facility inspection found the company to be in violation of current manufacturing regulations, including lack of documentation and written procedures.
Recalls & Warnings
June 01, 2012
Homeopathic Manufacturer Settles False Advertising Suit
June 1, 2012 — A federal court in California recently authorized the settlement of a class action lawsuit against Boiron Inc. and Boiron USA, Inc.
Recalls & Warnings
December 05, 2014
Maker of Immune Supplement Warned for Manufacturing Violations
On November 20, 2014, the FDA issued a warning letter to Urban Moonshine, Inc.
Recalls & Warnings
July 08, 2015
Marketer Prohibited From Promoting Mineral "Cure" For Autism
Kerri Rivera, author of "Healing the Symptoms Known As Autism," has signed an agreement with the Illinois Attorney General which prohibits her from promoting Miracle Mineral Supplement (MMS) as a cure for autism.
Recalls & Warnings
July 01, 2014
Maker of Elderberry Concentrate Warned for Manufacturing Violations
On June 23, 2014, the FDA issued a warning letter to Wyldewood Cellars Inc.
Recalls & Warnings
December 20, 2002
U.S. Seizes Supplement Illegally Marketed for Virus and Cold Use; FDA Steps Up Activity Against Supplements with False Claims
The U.S. Food and Drug Administration (FDA) announced that United States Marshals on Monday, December 16, 2002, seized approximately 3000 bottles, valued at more than $100,000, of EverCLR, a dietary supplement. EverCLR is marketed by Halo Supply Company of San Diego, Calif.
Recalls & Warnings
December 17, 2008
Airborne Settles Over False Advertising -- $7 Million to States
On December 17, 2008, the Seattle Times reported that Airborne Health, makers of a top-selling product marketed as a cold prevention and treatment remedy, signed a $7 million settlement to settle false advertising claims leveled by 32 state attorneys general and the District of Columbia.
Recalls & Warnings
August 25, 2018
Thirty-Two Children's Homeopathic Products Recalled
On August 22, 2018, King Bio issued a recall of 32 homeopathic products for children because some have have tested positive for microbial contamination.
Recalls & Warnings
August 29, 2017
FDA Warns Seller of Supplements for Allergies, Joint Pain, Bone Health, and More
On August 16, 2017, the FDA issued a warning letter to Total Nutrition, Inc.
Recalls & Warnings
June 10, 2017
Seller of Prostate, Immune Supplements & More Warned for Manufacturing Violations
On May 25, 2017 the FDA issued a warning letter to The Herbalist, Inc.
Recalls & Warnings
May 30, 2017
Seller of Vitamin C, Calcium, Mushroom Supplements and More Warned for Manufacturing Violations
On May 12, 2017 the FDA issued a warning letter to VitaPurity Corporatio.
Recalls & Warnings
June 07, 2011
FDA Seizes Elderberry Juice Concentrate Due to Unproven Claims
On June 3, 2011, The U.S. FDA announced that, at its request, U.S. Marshals seized elderberry juice products that have been distributed by Wyldewood Cellars Inc., based in Peck, Kan., because the products are unapproved and misbranded drugs.
Recalls & Warnings
August 09, 2010
FDA Warns Against "Miracle" Mineral Supplement
On July 30, 2010, The U.S. FDA warned consumers not to consume or use Miracle Mineral Solution, an oral liquid solution also known as "Miracle Mineral Supplement" or "MMS." The product, when used as directed, produces an industrial bleach that can cause serious harm to health.
Recalls & Warnings
June 20, 2002
Canadian Warning on Use of Bejai Bowyantan for Infants
On June 14, 2002, Health Canada warned Canadians not to use Bejai Bowyantan for their young children and infants because it contains a substance with similar toxic properties to another substance known to cause serious adverse reactions and death in children.
Recalls & Warnings
October 27, 2004
Some Supplements Can Damage Eyes At High Doses and with Topical Use
As reported by Reuters Health on October 21, 2004, an article in the current issue of the American Journal of Ophthalmology suggests that some herbal remedies and nutritional supplements can damage the eyes.
Recalls & Warnings
September 27, 2014
Chinese Flu Product Poses Lead Poisoning Risk
On September 26, 2014, the FDA warned parents and caregivers not to buy or use Bo Ying compound (manufactured by Eu Yan Sang) due to the potential risk of lead poisoning.
Recalls & Warnings
January 20, 2016
Seller of Aloe, Moringa Supplements Warned for Manufacturing Violations, Drug Claims
On January 13, 2016, the FDA issued a warning letter to Alkebulan International Services, LLC, following a facility inspection which found the company's products,Aloe Ferox and Moringa Oleifera Capsule to be adulterated because they prepared, packed, or held under conditions that ...
Recalls & Warnings
September 18, 2015
High Levels of Mercury and Lead Found in Ayurvedic Herbal Supplements
On September 17, 2015, the FDA announced that Shree Baidyanath Ayurved Bhawan Ayurvedic dietary supplements were found to contain high levels of lead and/or mercury, which can cause serious health problems.
Recalls & Warnings
December 12, 2014
Seller of Omega-3 "Syrup" Warned for Manufacturing Violations and Drug Claims
On October 16, 2014, the FDA issued a warning letter to Mr.
Recalls & Warnings
September 18, 2012
Maker of Noni, Nopal, Blood Sugar and Cholesterol Supplements Warned For Drug Claims, Misbranding, and Manufacturing Violations
On August 27, 2012, the FDA issued a warning letter to Naturavit, Inc. for making statements about dietary supplements Noni Imperial Hawaiian, Garlic and Parsley, Cholestol, Nopal and Diatrin that constitute drug claims.
Recalls & Warnings
November 26, 2012
Court Injunction Halts Sale of Cholesterol, CoQ10, Progesterone, Prostate Supplements and More
On November 20, 2012, Pharmacist's Ultimate Health agreed to cease sales and distribution of its dietary supplements by entering into a Consent Decree of Permanent Injunction in the U.S. District Court of Minnesota.
Recalls & Warnings
April 23, 2013
Seller of Digestion, Thyroid and Vitamin D Supplements Warned For Drug Claims
On November 5, 2012, the FDA issued a warning letter to The Women's Health Institute at Texas following a review of the company's various websites which found statements made about Digest + SEB, Iodine Plus 2, and D5000 Vitamin D dietary supplements to be drug claims.
Recalls & Warnings
May 10, 2013
Maker of Concentration, Pain, Immune, Cholesterol Supplements Warned For Drug Claims
On April 24, 2013, the FDA issued a warning letter to EuroPharma Co., Inc., following a review of the company's website which found statements made about Calm Kids, CholestCaps, CuraMed 375 mg, CuraMed 750 mg, Curamin, Mental Advantage, Tri-Iodine, and Viragen to be drug claims.
Recalls & Warnings
May 03, 2013
Maker of Omega-3, Saw Palmetto, St. John’s Wort Supplements And More Warned For Manufacturing Violations and Drug Claims
On March 19, 2013, the FDA issued a warning letter to Sunset Natural Products Inc.
Recalls & Warnings
October 05, 2012
Illegal Claims on Weight Loss, Immune System Dietary Supplements, and Few Backed by Clinical Data
On October 3, 2012, the U.S. Department of Health and Human Services issued a report warning that dozens of weight loss and immune system supplements have illegal claims of curing or treating disease on their labels and/or lack the scientific evidence to support such label claims.
Recalls & Warnings
September 05, 2014
Seller of "Nerve", "Cleanse" and Probiotic Supplements Warned for Drug Claims
On July 30, 2014, the FDA issued a warning letter to Plexus Worldwide, Inc., following a review of the company's website and product labels, which found statements made about Fast Relief, BioCleanse and ProBio5 to be drug claims.
Recalls & Warnings
April 01, 2004
Aloe Producer Recalls Product Due to Toxic Levels of Vitamin D
On March 26.2004, the Food and Drug Administration (FDA) announced that Aloe Commodities International, Inc., Carrollton, Texas, is recalling 1600 bottles of Solutions IE Ageless Formula II, Lot numbers P2207 and P2221 because they contain a significantly higher-than-labeled level of vitamin D3.
Recalls & Warnings
July 15, 2010
Supplement Company Pays $5.5 Million to Settle False Advertising Claims
On July 14, 2010, the Federal Trade Commission (FTC), as part of its ongoing efforts to stop bogus health claims, announced that it is requiring a major marketer of dietary supplements to pay $5.
Recalls & Warnings
June 21, 2011
FDA Seizes Probiotics Over Marketing Claims
On June 7, 2011, the U.S. FDA announced that, at its request, U.S. Marshals seized probiotic products from UAS Laboratories, Inc., of Eden Prairie, Minn. because the company markets the products as drugs.
Recalls & Warnings
March 04, 2008
Airborne Settles Lawsuit Over False Advertising of its "Miracle Cold Buster"
On March 4, 3008, the Center for Science in the Public Interest (CSPI) announced that the makers of Airborne -- a multivitamin and herbal supplement whose labels and ads falsely claimed that the product cures and prevents colds -- will refund money to consumers who bought the product, as part of a ...
Recalls & Warnings
March 16, 2006
Garden of Life, Maker of Primal Defense, Settles FTC Charges
On March 9, 2006, The Federal Trade Commission (FTC) announced that an operation that marketed dietary supplements sold at Whole Foods Market, GNC, the Vitamin Shoppe, and on the Internet settled FTC charges that they made deceptive advertising claims about their supplements.
News Release
January 29, 2014
You May Be Getting More Vitamin C Than You Think from Some Supplements, Cautions ConsumerLab.com -- 27% of Vitamin C Supplements Don't Meet Label Claims in Recent Tests --
White Plains, New York, January 29, 2014 — It's cold and flu season, which means many people are reaching for vitamin C, as it may modestly reduce cold symptoms (although it won't prevent a cold).
News Release
November 25, 2013
Many Probiotic Supplements Fall Short on Listed Amounts of Helpful Organisms
White Plains, New York, November 25, 2013 — Probiotic supplements and foods containing "friendly" bacteria or yeast have become popular among people hoping to improve bowel function, immunity, and even mood.
News Release
February 09, 2012
Probiotics grow in popularity but don't always deliver on promises says ConsumerLab.com -- New report provides guidance to consumers
White Plains, New York, February 9, 2012 — Probiotic supplements and foods containing "friendly" bacteria or yeast have become popular options for people hoping to improve bowel function or boost immunity. But many customers are confused by the vast array of choices.
News Release
August 16, 2010
Problems persist with ginseng supplements -- Review by ConsumerLab.com finds 45% of products don't provide full amount of ingredient or are contaminated
WHITE PLAINS, NEW YORK — August 16, 2010 — ConsumerLab.com reported today that five out of eleven ginseng supplements recently selected for testing contained less ginseng than expected from their labels or were contaminated with lead and/or pesticides.
News Release
June 30, 2010
Echinacea supplements vary widely in ingredients but found clear of contaminants according to ConsumerLab.com -- New review guides consumers through wide range of dosage, species, preparations, and formulas in echinacea products
WHITE PLAINS, NY — June 30, 2010 — Echinacea may help prevent colds and cold-symptoms, but choosing a supplement is difficult due to the range of ingredients offered. To provide consumers guidance, ConsumerLab.
News Release
May 07, 2001
Over forty percent of Echinacea products fail ConsumerLab.com review; Inadequate labeling and missing ingredients found common for popular herbal cold remedy
WHITE PLAINS, NY — May 7, 2001 — ConsumerLab.com, an independent evaluator of dietary supplements and nutrition products, today released results of its Product Review of echinacea supplements.
Recalls & Warnings
May 23, 2013
Seller of Sexual Enhancement, Cholesterol, Resveratrol Supplements and More Warned For Drug Claims
On May 2, 2013, the FDA issued a warning letter to Alternative Health Supplements, following a review of the company's website, which found statements made about several dietary supplements, including Regenerect, Alligin, Astaxanthin Advantage, HDL Cholesterol Management, Resveratrol, Coral Calcium ...
Recalls & Warnings
November 28, 2014
Seller of Herbal Extracts Warned for Manufacturing Violations, Drug Claims
On November 3, 2014, the FDA issued a warning letter to Avena Botanicals, Inc.
Recalls & Warnings
June 09, 2005
FTC Cracks Down on "HGH" Supplements; $20 Million in Consumer Redress
On June 9, 2005, The Federal Trade Commission (FTC) announced that two Florida businesses have agreed to a federal court order requiring them to pay up to $20 million in consumer redress – the largest monetary judgment ever obtained in an FTC health fraud case – to settle charges that they ...