Cordyceps is a fungus that has been used for centuries to treat a variety of different health problems. It has strong antioxidant effects, improves energy, and decreases fatigue, decreases stress, fatigue, and cholesterol, and even reduces some of the effects of aging. It may be able to increase dopamine levels, particularly in the elderly or depressed. It also facilitates phlegm removal and can alleviate chronic cough ailments and breathlessness caused by weakened lung functions.