Evidence Checker
Search herbs and compounds by evidence grade, from human clinical support down to mechanism-only data, so preliminary findings never read like settled ones.
Evidence
What the research actually supports
Evidence grades are only useful if you can see how they were assigned and how strong the underlying research is. These three views let you search by grade, read the aggregate picture, and see what is being asked about most.
Three views
Search it, read it, or watch it change
State of Supplement Evidence 2026
The site-wide picture as original aggregate research: what is well supported, what stays preliminary, and where the evidence mix has shifted.
Research Trends
Privacy-preserving aggregate trends from research activity on the site — which supplements and questions are being explored, month over month.
How grades are assigned
Grades come from study design, replication, and whether the research was done in humans — not from how promising a mechanism sounds. Where the evidence cannot carry a grade, none is shown.