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Super Goat Weed Effects

author image Karyn Maier
Karyn Maier is a seasoned columnist and feature writer. Since 1992, her work has appeared in Mother Earth News, The Herb Quarterly, Parenting, Club Mom and in many other print and digital publications. She is also the author of five books, including "50 Simple Ways to Pamper Your Baby."
Super Goat Weed Effects
Super goat weed is an herbal medicine that produces several effects. Photo Credit yogesh_more/iStock/Getty Images


Super goat weed is an herb belonging to the Epimedium genus of flowering plants, many of which are believed to provide aphrodisiac effects. This is likely why super goat weed is also known by several other names that reference this characteristic, such as rowdy lamb herb and horny goat weed. In Chinese medicine, goat weed is named Yin Yang Huo in honor of the mythical yin yang creature that achieved 100 sexual climaxes each day.

Enhanced Sexual Performance

While you may not have heard of super goat weed before, you’ve probably heard of male performance enhancing medications like sildenafil, or Viagra, and vardenafil, or Levitra. The interesting thing about super goat weed is that it produces the same effects in men with erectile dysfunction as these drugs do. In fact, the only difference between the two is the fact that drug therapies for erectile dysfunction are relatively new, while super goat weed has been in use for thousands of years.

Like male performance enhancing drugs, the primary target of super goat weed is type 5 phosphodiesterase, or PDE-5, an enzyme that breaks down cyclic guanosine monophosphate, or cGMP. This is important for you to know because cGMP depletion is the deflating factor involved in erectile dysfunction. An erection cannot occur without the release of sufficient amounts of nitric oxide to dilate blood vessels. If there isn’t enough cGMP available, nitric oxide release can’t happen. Super goat weed contains a substance called icariin, which, according to researchers at the University of California, effectively suppresses PDE-5.

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Additional Effects

Icariin, the so-called active ingredient in super goat weed, also appears to stimulate osteoblasts, specialized cells involved in building bone. Chinese scientists have demonstrated this effect in rats given flavonoid extracts of super goat weed. The results of this study suggest that super goat weed may treat or prevent osteoporosis.

This herb may also provide anti-cancer effects. A 2004 study conducted by the Shanghai University of Traditional Chinese Medicine found that the water extract of super goat weed inhibits the growth of new blood vessels in tumors, while an earlier study reported that extracts of this herb caused cancer cells to become stable again in test tube samples.

Potential Side Effects

In Traditional Chinese Medicine, the potent effects of super goat weed are tempered by combining it with other herbs. Otherwise, “hot” symptoms may develop, such as irritability or irregular heart rhythm. High dosages or long-term use of super goat weed may decrease thyroid function. This herb may also increase the effects of oral corticosteroids.

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