Quick answer: Tribulus does not raise testosterone in healthy men, though a few small trials reported better desire scores. Horny goat weed contains icariin, which acts like a weak PDE5 inhibitor in lab studies; human evidence is thin. High doses of horny goat weed have been linked to fast heart rate.
Tribulus
Popular in sports supplements. Controlled trials in healthy men show no testosterone rise.
Horny goat weed
Icariin works on blood flow pathways in the lab. Real-world human trials are lacking.
Safety
- Dizziness or fast heartbeat with horny goat weed
- Do not combine with ED pills or nitrates without medical advice
- Avoid with hormone-sensitive conditions
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General information, not medical advice. Maxentra is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease.