High doses of biotin from supplements can interfere with a wide range of laboratory and at-home tests, including those for pregnancy, doping, COVID, and heart attacks. Get the details in the Biotin section of our B Vitamin Supplements Review.
Also see: Which vitamins and supplements should be stopped before getting blood work and laboratory tests?
Flaxseeds contain compounds that are converted in the body into ones having weak estrogen-like effects. Find out if these compounds have beneficial or adverse effects in the Concerns and Cautions section of our Flaxseed Review. Also see our Top Picks for whole and ground flaxseed.
A recent study identified benzene in 80% of tested sunscreen products, with three products containing benzene levels considered to be high. Get the details in our updated article about safe sunscreens.
Can sucralose (such as in Splenda) cause DNA damage? See what new research suggests in our updated article about sweeteners.
Does taking fish oil after dental "deep cleaning" reduce bleeding and pocketing around teeth in people with severe gum disease? Find out what a recent study showed in the Periodontitis section of our Fish Oil Supplements Review. Also see our Top Picks for fish oil.
Did high-dose vitamin D improve outcomes in people with Grave’s disease? See what a recent study found in the What It Does section of our Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Do alpha hydroxy acids (AHAs) help or hurt dry skin? Find out in our updated article about finding soaps that won’t irritate skin.
Find out if D-ribose can reduce skin wrinkles, and learn if it might worsen cognitive function in our updated article about D-ribose.
Some people may experience a “loss of response” to melatonin. Find out what may cause it and what to do if it happens in the ConsumerTips section of our Melatonin Supplements Review. Also see our Top Picks for melatonin.
Which type of fiber supplement is best for treating mild, chronic constipation? See what experts recommend, and why, in the What It Does section of our Psyllium Supplements Review.