Horny Goat Weed (Epimedium sagittatum): The Libido and Bone Herb
Horny Goat Weed — Epimedium sagittatum — has perhaps the most memorable common name in the herbal materia medica, said to originate from a Chinese goat herder who noticed his flock becoming unusually amorous after grazing on the plant. Known in Traditional Chinese Medicine as Yin Yang Huo (meaning “licentious goat herb”), Epimedium has been used in Chinese medicine for over 2,000 years for conditions of kidney yang deficiency — the TCM pattern that corresponds to low libido, erectile dysfunction, fatigue, low back pain, and reduced bone density. Modern pharmacological research has identified icariin — a flavonoid glycoside — as the primary active compound, providing a well-characterised mechanism for the traditional applications.
At Herba Naturalle, Horny Goat Weed is listed in the comprehensive herb index as a male vitality and bone health herb — complementing the Gokshura Ashwagandha Plus formulation.
Active Compounds
- Icariin — the primary prenylated flavonoid; the most pharmacologically characterised compound; inhibits PDE-5 (phosphodiesterase type 5 — the same enzyme targeted by Viagra); stimulates nitric oxide production; promotes bone formation; has testosterone-mimicking activity
- Icariside II and baohuoside I — icariin metabolites with enhanced PDE-5 inhibition
- Flavonoids — quercetin, kaempferol, and related compounds
- Polysaccharides — immune-modulating
Clinical Applications
Erectile Function
The most pharmacologically well-supported application. Icariin inhibits PDE-5 — the same enzyme targeted by sildenafil (Viagra) and tadalafil (Cialis), though with lower potency. PDE-5 inhibition allows nitric oxide-mediated relaxation of smooth muscle in penile arterial tissue, improving blood flow and facilitating erection. Multiple animal studies and some preliminary human data support this mechanism.
Libido and Sexual Function (Male and Female)
The testosterone-mimicking and nitric oxide-promoting effects of icariin support libido in both men and women — used for low sex drive associated with fatigue, hormonal decline, and kidney yang deficiency patterns.
Bone Density
Icariin promotes osteoblast activity (bone-building cells) and inhibits osteoclast activity (bone-resorbing cells) — increasing bone mineral density. Clinical studies show improvements in bone density markers in post-menopausal women. Relevant for osteoporosis prevention.
Immune Modulation
Epimedium polysaccharides stimulate immune function — relevant in chronic immune depletion and fatigue states.
Cardiovascular
Nitric oxide-promoting effects improve vascular function and blood pressure — with mild antihypertensive and cardioprotective properties.
How to Use
- Standardised extract (icariin 10–40%): 250–500mg daily
- Tincture (1:3): 3–5ml twice daily
Safety
- Anticoagulants: Flavonoids may have mild antiplatelet activity
- Heart arrhythmia: Tachycardia reported at high doses — avoid in arrhythmia
- Prostate cancer: Androgenic stimulation — professional guidance required
- Pregnancy: Avoid
- Blood pressure medication: Vasodilatory effects may enhance antihypertensive medication
Contact Herba Naturalle for male vitality herbal support. Browse all products and the full herb index.
This article is for informational purposes only. Please consult a qualified medical herbalist before use.