Hormone-related claims evidence brief
Tribulus terrestris is a plant extract commonly used for testosterone, libido, strength, and male vitality. Its popularity is much stronger than its performance evidence.
Popular testosterone-booster marketing is not matched by convincing hormone, performance, or body-composition evidence.
CrossFit/rugby trials: no meaningful testosterone, body-composition, or performance benefit.
Saponin content and extract quality vary widely across products.
Libido or biomarker claims do not convert into strength, testosterone, or muscle-gain evidence.
Source Drawer
The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.
Send the disputed claim, source link, and why it changes the practical verdict. Corrections that materially affect the claim, dose, caveat, or rating are prioritized.
Report a source or rating issue