Semenax Review: What Its One Published Trial Found

The trial behind Semenax

Researchers enrolled 78 men aged 30 to 60 in India during 2011 and 2012. The main analysis included 63 of them, 32 on Semenax and 31 on placebo. Participants took 4 capsules twice a day for two months. On Semenax, average ejaculate volume climbed from 2.49 to 2.97 ml. On placebo it slipped from 2.64 to 2.43 ml. Volume rose by 20% or more in half of the Semenax group, against 16% on placebo.

Several limits deserve attention. Leading Edge Health funded the study, and its lead author is affiliated with the company. Publication came about ten years after the trial ran. Men with normal volume benefited significantly, but men with low volume (under 2 ml), who are the product's intended audience, did not. Sperm count, motility, sexual function scores and orgasm quality showed no significant difference from placebo, and no outside team has repeated the work.

Some older pages pointed to a 2006 study in the journal Urology. That study looked at a different flower pollen product and its effect on chronic prostatitis symptoms. It did not involve Semenax or semen volume.

Key Ingredients

On the official ingredients page (October 2026), 16 ingredients appear, and none comes with an amount:

• Swedish flower pollen
• L-arginine and L-lysine (the trial formula supplied 250 mg of L-arginine a day, far less than the gram-level doses in most arginine studies)
• Zinc aspartate and zinc oxide (zinc mostly benefits men who are deficient)
• Also listed: vitamin E, oat extract, sarsaparilla, cranberry extract, hawthorn, pine bark extract, pumpkin seed, Butea superba, muira puama, catuaba bark, maca and L-carnitine

Epimedium and Tribulus terrestris were part of the trial formula but don't appear on the current page. We couldn't confirm whether the formula has changed. Safety details are in our Semenax side effects article.

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