Cordyceps is an herb used in Chinese medicine to restore the ying and yang connection between the lungs and the kidneys. It is said to contain inhibitor substances that attack damaged lung cells and may slow down the degeneration of the lung. 

Studies on this herb suggest that it can reduce the ill effects of radiation treatment, lower blood pressure, reduce symptoms of asthma and other respiratory problems, increase energy levels, improve memory, and improve male sexual ability.