Horny Goat Weed (Epimedium)
Also Known As: Icariin, Yin Yang Huo, Barrenwort, Epimedium Sagittatum
Compound Type: Natural PDE5 Inhibitor / Testosterone Support
Legend has it that a Chinese goat herder noticed his flock became sexually active after grazing on a specific patch of weeds. Thus, “Horny Goat Weed” was discovered. While the name sounds like a gas station gimmick, the science is surprisingly solid.
The active compound, Icariin, is a natural phosphodiesterase type 5 (PDE5) inhibitor. This means it works on the exact same biological pathway as Sildenafil (Viagra), albeit much more gently.
How Does Horny Goat Weed Affect Penis Size?
It is a dual-action supplement: it increases Nitric Oxide production and prevents that Nitric Oxide from being broken down. This makes it a top-tier supplement for maintaining the “pump” during enlargement exercises.
The Science: PDE5 Inhibition & Icariin
1. The “Natural Viagra” Mechanism:
Clinical studies have isolated Icariin as the bioactive agent. It inhibits the enzyme PDE5, which is responsible for “killing” an erection. By blocking this enzyme, cGMP levels remain high, keeping the smooth muscle relaxed and the blood vessels wide open.
2. Nerve Growth Factor:
Unique to Icariin is its ability to mimic nerve growth factors. Penis enlargement exercises can sometimes strain the dorsal nerve. Epimedium helps repair damaged nerves, ensuring that sensitivity and signal transmission remain high.
3. Testosterone Mimetic:
While not a steroid, Icariin has been shown to mimic the effects of testosterone on penile tissue, promoting the maintenance of healthy erectile structure and preventing atrophy (shrinkage).
✔ The Verdict: HIGHLY RECOMMENDED
The Real Deal. This is one of the few herbal supplements with a proven pharmaceutical mechanism of action. We strongly recommend it for older men or anyone who struggles with erection quality during their PE routine. Tip: Look for “Standardized to 10% Icariin” (or higher).
600mg – 1g
Standardized Extract
Take 45m before activity
Safety Profile & Side Effects
- Dizziness: Due to rapid vasodilation (low blood pressure).
- Dry mouth / Thirst.
- Nosebleeds (rare, at very high doses).
- Blood Pressure Meds: Do not combine with Nitrates or Alpha-blockers.
- Aspirin: Epimedium thins the blood; use caution if already taking anticoagulants.
Data source: WebMD / PubMed
Recommended Products
Potency matters. Don’t buy generic “weed.” Buy standardized Icariin.
View on Amazon