Benefits of Fadogia Agrestis

Evidence-Based Benefits

• Testosterone increase — Yakubu et al. (2005) found that aqueous stem extract of Fadogia agrestis significantly increased serum testosterone levels in male rats in a dose-dependent manner at 18, 50, and 100 mg/kg body weight over 5 days
• Aphrodisiac effects — the same study by Yakubu et al. showed increased mount frequency, intromission frequency, and ejaculatory latency in rats, suggesting pro-sexual effects mediated by testosterone increases
• Leydig cell stimulation — the proposed mechanism involves direct stimulation of testicular Leydig cells via saponin compounds, potentially increasing endogenous testosterone production rather than providing exogenous hormones

What the Research Says

The evidence base for Fadogia agrestis is extremely limited. Yakubu et al. (2005) published the primary study, administering aqueous stem extract to male Wistar rats at 18, 50, and 100 mg/kg body weight for 5 days. The extract produced dose-dependent increases in serum testosterone and pro-sexual behavioral changes. However, the same research group published a follow-up study (Yakubu et al., 2008) showing significant dose-dependent testicular toxicity, including damage to seminiferous tubules and interstitial tissue at 100 mg/kg. These findings raise serious safety concerns that remain unresolved due to the complete absence of human clinical trials. The supplement gained popularity through social media and podcast discussions (notably Huberman Lab) rather than through clinical evidence, and the gap between consumer enthusiasm and scientific evidence is among the largest in the supplement industry.

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