Horny goat weed (epimedium)

Horny goat weed is a herb that has been used as a traditional remedy in China for centuries. It’s used by some people in the hope of helping low libido, erectile dysfunction, fatigue, pain and other conditions.

Horny goat weed uses

Some men take horny goat weed in the belief that it’s a natural alternative to drugs for erectile dysfunction (ED). Although still very preliminary, there’s some evidence to support this. A 2008 laboratory study found that a compound in the herb blocks the effects of an enzyme that restricts blood flow to the penis. Epimedium, the plant from which horny goat weed is derived appears to act as a phosphodiesterase inhibitor, similar to the “big three” drugs currently prescribed for ED. The study also suggested that horny goat weed could theoretically work better - and cause fewer side-effects - than current drugs for erectile dysfunction.

Although the study is promising, it is based only on experiments in the laboratory. It’s too early to tell if horny goat weed will prove an effective and safe treatment in people.

Horny goat weed has also been studied as a treatment for other conditions, such as osteoporosis and hardening of the arteries. The results have been unclear.

Horny goat weed dosage and instructions for use

Horny goat weed is an unproven treatment, and there is no established dose. Some studies have used between 6 grams and 15 grams a day. Standardised extracts of between 5% and 60% are available, but there is no set, nor widely acknowledged and accepted recommended dose.

Horny goat weed food sources

There are no natural food sources of horny goat weed.

Horny goat weed supplement information

Horny goat weed can come in many forms: powders, capsules and tinctures. As with any supplement, keep horny goat weed in a cool, dry place, away from humidity and direct sunlight.

Horny goat weed warnings

• Side-effects. Most people seem to tolerate short-term use of horny goat weed fairly well, at least at the doses studied. It may cause upset stomach and dry mouth. In some people, horny goat weed may cause irregular heartbeat, low blood pressure, nosebleeds and mood changes. High doses have been linked to spasms and respiratory failure.
• Risks. Horny goat weed may not be safe in high doses or as a long-term treatment. People who have health conditions - such as immune disorders, heart or lung problems, low blood pressure, bipolar disorder or thyroid problems - should not use horny goat weed without checking with their doctor.
• Interactions. If you take any medicines or supplements regularly, talk to your doctor before you start using horny goat weed. It could interact with drugs such as blood thinners, aspirin, oral contraceptives, antidepressants, treatments for immune disorders and thyroid problems, and medicines that lower blood pressure or cholesterol.

Given the possible risks, women who are pregnant or breastfeeding and children should not take horny goat weed.