Supplement claims, checked against what was actually tested in humans.
Every claim gets three questions. Then we show you the study: the real record, highlighted, with its citation.
- Who took part?
- What was measured?
- What actually changed?
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The rankings
12 Testosterone Boosters
Ranked by what's actually been tested, from “only tested in rats” to “possibly effective”.
Read the ranking + every source →
16 Peptides
BPC-157, ipamorelin, retatrutide and more: what the human studies actually tested.
Coming with the filmHow we check a claim
1. Who took part?
Rats, cells, healthy young men, older men low in a vitamin? The answer changes what a result can tell you.
2. What was measured?
A hormone number in saliva is not the same as muscle, energy or how people say they feel.
3. What actually changed?
Compared with placebo, or just compared with before? We report the result in the study's own words.