Horny Goat Weed (Epimedium)
Herbal
Also known as: Epimedium, Yin yang huo, Icariin, Barrenwort
C
Grade C💊 250-1000mg extract (standardized to 10-20% icariin)🎯 3 primary uses🔗 3 synergies⚠️ Review warnings
Levels upVitality+50 pts
Overview
Traditional Chinese herb with PDE5 inhibiting properties, though weaker than pharmaceuticals.
Primary Uses
LibidoErectile support (mild)Traditional aphrodisiac
Frequently Asked About Horny Goat Weed (Epimedium)
How much Horny Goat Weed (Epimedium) should I take?
The typical effective range is 250-1000mg extract (standardized to 10-20% icariin). Individual needs vary based on age, body weight, diet, and goals — start at the lower end and adjust based on response. Always consult a healthcare provider before starting a new supplement.
When is the best time to take Horny Goat Weed (Epimedium)?
1-2 hours before activity or divided daily. Consistency matters more than perfect timing — pick a daily anchor (e.g. with breakfast or before bed) and stick with it.
Should I take Horny Goat Weed (Epimedium) with food?
Either way.
Does Horny Goat Weed (Epimedium) interact with medications?
Yes — known interactions include Blood thinners, Blood pressure meds, and PDE5 inhibitors (additive). If you take any prescription medication, talk to your doctor or pharmacist before starting Horny Goat Weed (Epimedium).
What does Horny Goat Weed (Epimedium) pair well with?
Horny Goat Weed (Epimedium) stacks well with Tribulus, Maca, and Other libido herbs — these combinations either improve absorption or work synergistically toward common goals.
Who should not take Horny Goat Weed (Epimedium)?
Horny Goat Weed (Epimedium) should be avoided or used with caution by people with Heart conditions, Blood pressure issues, and Bleeding disorders. Pregnant or breastfeeding women should consult a healthcare provider before use.
What are the side effects of Horny Goat Weed (Epimedium)?
Most people tolerate Horny Goat Weed (Epimedium) well. The most commonly reported side effects are Dizziness, Dry mouth, and Nosebleed. Side effects are usually dose-dependent — lowering the dose often resolves them.
Dosage
Typical range
250-1000mg extract (standardized to 10-20% icariin)
Timing
1-2 hours before activity or divided daily
With food
Either way
Duration
Daily use for ongoing effect
Special Populations
Those seeking mild erectile/libido support
Research & Studies
Search the literature now
We haven’t curated landmark studies for Horny Goat Weed (Epimedium)yet — one-click into the primary literature here. PubMed (RCTs) is usually the highest-signal starting point.
Search Horny Goat Weed (Epimedium) research
Mechanism of Action
- • Contains icariin (weak PDE5 inhibitor)
- • Traditional aphrodisiac
- • May support testosterone (weak)
- • Bone health effects too
Evidence Quality
Evidence Grade C
Traditional use, icariin has PDE5 effects but weaker than Viagra
Safety & Contraindications
Serious Warnings
- • Blood pressure effects
- • May affect heart rhythm
Contraindications
- • Heart conditions
- • Blood pressure issues
- • Bleeding disorders
Common Side Effects
- • Dizziness
- • Dry mouth
- • Nosebleed
- • Rapid heart rate
Pregnancy & Breastfeeding
Avoid
Liver & Kidney Notes
Safe short-term
Interactions
💊 Medications
- • Blood thinners
- • Blood pressure meds
- • PDE5 inhibitors (additive)
🧪 Supplements
- • Often in libido formulas
🍽️ Food & Alcohol
- • Either way
Stacking & Synergies
Pairs Well With
Avoid Combining With
PDE5 inhibitorsBlood pressure meds without monitoring
Best Goal Synergies
LibidoMild erectile support
Buying Guide
What to Look For
- • Icariin standardization
- • Third-party tested
Standardization Markers
Icariin percentage (10-20% typical)
Adulteration risk
Moderate
Practical Notes
- • Much weaker than Viagra
- • Icariin is the active compound
- • Traditional Chinese herb
Tags
libidoerectiletraditionalpde5
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Root extract that may inhibit SHBG and support prostate health and urinary function.
Last reviewed: June 2026 by the Formulate Research Team. Sources cited above; methodology and scoring criteria published here.
Cite this page
Formulate Research Team. (2026, June). Horny Goat Weed (Epimedium) — Evidence-Based Supplement Guide. Formulate Supplement Encyclopedia. https://app.formulate-health.app/learning/supplements/horny-goat-weed
Educational content based on published research and our scoring methodology. Not medical advice — consult a qualified healthcare provider before starting, stopping, or changing supplements, especially if you take medications, are pregnant, or have a medical condition.