Supplements
Vitamins, creatine, beta-alanine and the rest, checked against the research.
Read this first. These pages explain what research found. They are not advice to take any supplements. Most supplement studies are in adults, and supplements are tested less extensively than medicines.
Want one checked? Suggest a supplementOpen a review to see what the studies found, what to do with that, and where the evidence runs thin.
Suggest a supplement
Tell us which supplement you want checked. We look at whether it works and how safe it is. We do not give doses.
Submitted successfully!
Please allow 24 hours before it appears on the site. If you don’t see our email, check your spam folder.
Every supplement gets the same two ratings. They are about the supplement itself, so they can differ from the claim that sent you here.
Does it work?
How safe is it?
A good safety rating never means skip the doctor. Supplements are tested less extensively than medicines, and products can differ from their labels. Effects can also be different from person to person, so a result in a study may not be what you get.
These are planned and not checked yet. Want one moved up? Send it in.