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Product Review

B Vitamin Supplements Review (B Complexes, B6, B12, Biotin, Folate, Niacin, Riboflavin & More)

See Our Top Picks and Which 5 Failed Testing

B Vitamins Review 2024

CL Answer

What is the best sunscreen based on safety and efficacy?

We’ve boiled down the latest research about mineral and chemical sunscreens, including product tests, to help you choose the best sunscreen (which will depend on whether you expect to be in or out of the water). We also list popular sunscreens that have, or have not, been found to contain cancer-causing compounds (benzene and benzophenone).

Carcinogens in Sunscreens - Bottle of sunscreen with a question mark

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.

Home Test COVID

Clinical Update

1/04/2022

Two New Antigen Tests Reviewed

The FDA recently authorized two new, home antigen tests (from Roche and Siemens). We evaluated the data for each. Find out how they compare to seven other antigen tests on the market, and see our Top Pick among antigen tests.

CL Answer

Which vitamins and supplements should be stopped before getting blood work, laboratory tests, or medical imaging?

Find out which vitamins and supplements can interfere with blood, urine or stool tests, and imaginging tests, like bone scans and MRIs. Learn how B vitamins such as biotin, niacin and riboflavin, as well as calcium supplements, St. John’s wort, vitamin C, and others supplements can affect test results, as well as common foods that may interfere with tests.

Vitamin & Supplements to Stop Before Blood Tests

Recalls & Warnings

May 08, 2023

SD Biosensor Pilot At-Home COVID-19 Tests Recalled Due to Bacterial Contamination

On May 4, 2023, the FDA warned consumers and health care providers not to use certain lots of Roche Diagnostics’ SD Biosensor, Inc. Pilot COVID-19 At-Home Tests due to bacterial contamination in the test kit’s liquid solution.