Also known as Cordyceps Sinensis; it is one of the most valuable medicinal herbs in Traditional Chinese Medicine (TCM). In TCM, this herb has an extensive history of use in the treatment of mental and physical exhaustion and is often used as a rejuvenator for the increased energy while recovering from serious illness. It is also known to be used regularly in the treatment of patients with leukemia, heart, liver and kidney problems. Additionally, it is known to strengthen the immune system and is used as a treatment against respiratory ailments such as asthma, bronchitis, cough and lung infections. It is believed to be highly effective against impotence (lack of libido) and is extensively used in China as an aphrodisiac.