Horny Goat Weed
herbs
Horny Goat Weed (Epimedium) is a traditional Chinese herb traditionally used to support sexual function and libido in both men and women. The herb contains icariin, a compound that may work similarly to PDE5 inhibitors by improving blood flow. Evidence for efficacy remains limited, with most research being preliminary or of modest quality.
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Benefits
Dosage
Typical Dose
500-1000 mg daily
Upper Limit
1500-2000 mg daily
Timing
With meals, divided into 2-3 doses
Forms & Bioavailability
Dried herb/powder
Low to moderate
Standardised extract (10-50% icariin)
Moderate to high
Capsules
Moderate
Liquid tincture
Moderate to high
Side Effects
Interactions
Research Summary
Limited human clinical trials support Horny Goat Weed's efficacy; most evidence derives from traditional use and in vitro studies. A few small studies suggest icariin may improve erectile function, but results are inconsistent and sample sizes are modest. Further high-quality research is needed to establish safety and effectiveness compared to established treatments.
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The Bottom Line on Horny Goat Weed
Horny Goat Weed is moderately researched with promising but sometimes mixed evidence.It is most commonly used for may improve erectile function and sexual arousal and could enhance blood flow and circulation. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.
About Our Research
This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.
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