Cordyceps is a fungus that lives on certain caterpillars in the high mountain regions of China. Supplement makers are able to get enough of the product to sell because cordyceps will reproduce in the laboratory.
Cordyceps is used to treat coughs, chronic bronchitis, respiratory disorders, kidney disorders, nighttime urination, male sexual problems, anemia, weakness, ringing in the ears, unwanted weight loss.
It is also used for strengthening the immune system, improving athletic performance, reducing the effects of aging, promoting longer life, and improving liver function in people with hepatitis B.
Some people use cordyceps as a stimulant, a tonic, and an “adaptogen,” which is used to increase energy, enhance stamina, and reduce fatigue.