Ironically, since the introduction of Viagra, the search for a natural alternative for erectile dysfunction has increased significantly. And as it turns out, the Chinese may already have had the answer two millennia ago.
Naturally occurring only at high altitudes in Tibet and China, Cordyceps sinensis has none-the-less been collected as a medicinal mushroom since time immemorial. With our modern-day globalization of trade and information, this minute fungus from remote mountain areas of China is now miraculously becoming popular also in the West.
Since the time of Christ, Oriental physicians have administered Cordyceps sinensis to improve physical as well as sexual prowess and stamina. The earliest written record of this can be found in the book The Classic Herbal of the Divine Plowman. from around 200 A.D.
There is a reason why the common English name for Cordyceps is Caterpillar fungus. In nature, it grows as a parasite on silk-worm caterpillars, eventually killing them, and finally sprouting out of their dead bodies. Not very appetizing, is it? However, Cordyceps sinensis can now be grown on a rice medium and harvested free from any caterpillar carcasses, heavy metals, or contaminating bacteria and funguses. Cordyceps grown under these controlled conditions has been shown to contain the same therapeutic compounds as its wild counter-parts.
A Chinese study on Cordyceps sinensis, predating the 1998 release of Viagra by 13 years, found a 64% improvement in men with sexual dysfunction when they consumed 1 g of Cordyceps per day. 
There are three likely contributing factors why Cordyceps sinensis appears to have an effect on sexual dysfunction:
– At least three studies have demonstrated that Cordyceps sinensis helps improve physical stamina and prowess in general. [2,3,4] In the early 1990's, nine Chinese women broke world records when the Chinese National Games were held. When interviewed about their success, they unanimously gave credit to their use of Cordyceps extract. [5,6]
– Two published research papers indicate that Cordyceps helps increase blood flow by diluting blood vessels [7,8], which would be of significant relevance in sexual dysfunction.
– Thirdly and perhaps most important of all is that two studies have shown Cordyceps sinensis to “significantly increase” the production of testosterone in males. [9,10]
Note: This article is for scientific and informational purposes only. It is very important to always consult with a licensed medical doctor before using an herb to treat any medical condition.