We read the trials, score formulations against what the literature actually supports, and publish the rubric we use. No marketing claims, no testimonials.
See the 2026 formulation ranking
Serum testosterone declined across successive birth cohorts, independent of age and BMI. We look at what the longitudinal data supports.
Restricting healthy young men to five hours a night reduced daytime testosterone by 10 to 15% in a controlled trial.
One of the few botanicals here with replicated randomized evidence, at a dose range the trials actually used.
Proprietary blends, herb-equivalent dosing and unstandardized extracts are all legal, and all prevent verification.
The trials were run on extracts standardized to eurycomanone. Unstandardized root powder is a different material.
Correcting a deficiency produces measurable change. Supplementing beyond sufficiency does not.
