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Acai Berry (1)
Acetyl-L-Carnitine Supplements (11)
Alginate Supplements (For Reflux) (4)
Aloe Juices, Gels, and Supplements (2)
Alpha-Lipoic Acid Supplements (10)
Apple Cider Vinegar (12)
Ashwagandha Supplements (34)
Astaxanthin Supplements (5)
Avocado Oil (5)
B Vitamin Supplements (181)
Berberine Supplements (11)
Bone Broth (2)
Calcium Supplements (46)
Cancer Prevention (1)
CBD & Hemp Extract Supplements (60)
Chia Seed (3)
Cholesterol-Lowering Supplements (Sterols/Stanols and Policosanol) (12)
Choline Supplements (20)
Chromium Supplements (1)
Cinnamon Supplements and Spices (23)
CLA Supplements (2)
Cocoa Powders, Dark Chocolate, Extracts, Nibs & Supplements (64)
Coconut and MCT Oils (14)
Coconut Waters (2)
Collagen Supplements (41)
CoQ10 and Ubiquinol Supplements (47)
Cranberry Juices and Supplements (19)
Digestive Enzymes (10)
D-Mannose Supplements (3)
Echinacea Supplements (3)
Elderberry Supplements (5)
Electrolytes (3)
Essential Oils (6)
Evening Primrose & Flaxseed (ALA/GLA) (11)
Extra Virgin Olive Oil (41)
Fish Oil /Omega-3 Fatty Acid Supplements (246)
Flaxseed (9)
Fruits, Veggies, and Other Greens Supplements (15)
GABA Supplements (3)
Garcinia Cambogia (HCA) Supplements (6)
Garlic Supplements (12)
Ginger Supplements (18)
Ginkgo Supplements (8)
Ginseng Supplements (10)
Gluten-Free Grains (1)
Green Coffee Bean Extract Supplements (2)
Green Tea Supplements and Drinks (63)
HGH - human growth hormone (1)
Hoodia Supplements (1)
Huperzine A Supplements (2)
Inactive Ingredients (11)
Iron Supplements (44)
Joint Health for Animals (12)
Joint Health Supplements (25)
Kelp (Supplements) (4)
Lactose Intolerance Products (1)
L-Arginine Supplements (23)
L-Citrulline Supplements (2)
Lion's Mane and Chaga Mushroom Supplements (9)
Low-Dose Lithium Supplements (6)
L-Theanine Supplements (9)
L-tryptophan and 5-Hydroxy-L-tryptophan (5-HTP) (4)
Lycopene Supplements (7)
Lysine Supplements (1)
Maca Supplements (2)
Magnesium Supplements (66)
Melatonin Supplements (82)
Menopause Supplements (21)
Milk Thistle Supplements (4)
Multivitamin and Multimineral Supplements (37)
Muscle & Workout Supplements (Creatine and BCAAs) (34)
NAC (N-Acetyl Cysteine) Supplements (24)
NAD Boosters (NAD+/NADH, Nicotinamide Riboside, and NMN) (17)
Nutrition Bars (4)
Oats (Rolled and Steel-Cut) Review (15)
Olive Leaf Extract (1)
Phosphatidylserine Supplements (2)
Plant Based Milks (11)
Pomegranate Juice and Supplements (1)
Potassium Iodide/Iodate (Radioprotective Agents) (1)
Potassium Supplements (18)
PQQ (Pyrroloquinoline Quinone) (2)
Prebiotics (11)
Probiotics (145)
Prostate Supplements (Saw Palmetto and Beta-Sitosterol) (12)
Protein Powders (81)
Psyllium Fiber Supplements (14)
Quercetin & Rutin Supplements (14)
Red Yeast Rice Supplements (26)
Reishi Mushroom Supplements (10)
Resveratrol (Red Wine, Knotweed and Other Sources) (18)
Saffron Supplements (4)
SAMe Supplements (6)
Seaweed Snacks and Foods (3)
Selenium Supplements (13)
Sexual Enhancers (4)
Shelled Walnuts (Halves & Pieces) (2)
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Taurine Supplements (1)
Tuna, Salmon & Sardines (29)
Turmeric and Curcumin Supplements and Spices (113)
Valerian Supplements (5)
Vision Supplements with Lutein, Zeaxanthin & AREDS2 Formulas (28)
Vitamin A Supplements (9)
Vitamin C (43)
Vitamin D Supplements (322)
Vitamin E Supplements (23)
Vitamin K Supplements (18)
Water Filter Pitchers (29)
Weight Loss Supplements (7-Keto DHEA, Forskolin and Stimulant Blend Supplements) (3)
Wellbutrin vs. Generic Bupropion (2)
Zinc Supplements, Lozenges, and Melts Review (26)
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Berberine Supplements

Problems With Berberine Sold on Amazon

December 22, 2023
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Recent tests of 33 berberine supplements purchased on Amazon and Walmart.com showed that many contained less than half the listed amount of berberine. Get the details, by brand, in our Berberine and Goldenseal Supplements Review, which includes our tests of popular brands and Top Picks for berberine and goldenseal.

Berberine & Cancer

October 13, 2023
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Does berberine reduce the risk of colon cancer recurrence? Find out what research has shown in the Other uses section of our Berberine Supplements Review, which includes our Top Picks for berberine.

Berberine for Prediabetes?

August 04, 2023
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Does taking berberine help lower blood sugar and cholesterol in people with prediabetes? Find out what a recent study showed the Berberine section of our Berberine and Goldenseal Supplements Review.

Also see: Which supplements and foods can help lower or control blood sugar?

Berberine for Body Composition?

June 23, 2023
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A form of berberine is promoted as having "a positive effect on body composition." We looked into the study on which this claim is based. See what we learned in the What It Does section of our Berberine Review.

Berberine's New Popularity

June 06, 2023
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Berberine is being called "nature’s Ozempic" – referring to the type 2 diabetes drug also used for weight management. But is there evidence to support this? See our Berberine Review to find out what it can do, if it's safe, how products rate on quality, and our top choices.

Is Berberine Safe?

December 02, 2022
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Learn more in the Concerns & Cautions section of our Berberine Supplements Review.

Berberine Top Pick Changed

November 22, 2022
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We are no longer recommending our original Top Pick among berberine supplements. Find out why, and see our current product suggestion in the Top Picks section of our Berberine and Goldenseal Supplements Review.

Improving Berberine Absorption?

July 30, 2021
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Learn if special formulations have greater benefit than berberine alone, in the ConsumerTips section of our Berberine and Goldenseal Supplements Review.

Berberine vs. Colon Cancer?

February 03, 2020
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A large study investigated the potential for berberine (promoted for blood sugar control) to prevent precancerous colon polyps. Find out if it worked in the What It Does section of the Berberine & Goldenseal Supplements Review. Also see our Top Pick for berberine.

Berberine Side Effect

June 04, 2018
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Supplements that contain berberine (a compound extracted from goldenseal) can cause a range of side effects, in addition to drug interactions. It was recently reported that berberine can cause a rare, but severe, skin reaction. Learn more in the Concerns and Cautions section of the Berberine and Goldenseal Supplements Review. Also see our Top Pick among products in this category.