Before you take that supplement,read what the research says.
Supplements are essentially no different than drugs and can be both therapeutic and toxic. The goal of this guidebook is to highlight the supplements (or natural drugs) that have been tested in clinical studies. This website is still under development.
Every entry gives you the dose that was actually tested in people, the side effects that showed up, and what the studies found — in language you don't need a science degree for.
79 entries across 19 categories · last updated October 27, 2026
Talk to your doctor
Doses that work in a small trial can give variable results and may interfere with some medications. Inform your doctor before you start taking this natural drug.
Start here
Pick a supplement to see its dose, side effects and evidence.