One of three sulfur-containing amino acids. It acts as an antioxidant, and detoxifies many harmful chemicals including those from cigarette smoke, pollution and alcohol, as well as copper and heavy toxic metals. It helps protect cells against the effects of x-ray and nuclear radiation. Cysteine has also been found to increase hair growth by increasing the diameter of hair shafts. Cysteine can prevent hangovers, promote healing and boost the immune system. It is helpful in liver disease, age spots, promoting healing after surgery, in the treatment of bronchitis, emphysema and tuberculosis.
