N-Acetyl-L-Cysteine is a natural sulphur containing amino acid derivative and antioxidant. N-Acetyl-L-Cysteine (NAC) Amino Acid from Solgar. Solgar offers guaranteed purity and potency of each amino acid. Pharmaceutical grade amino acids imported from the World's finest sources. Natural amino acids free from yeast, soy, dairy, eggs, wheat, corn, sugar, salt and starch. People use NAC for a variety of maladies. It's use has been promoted as a treatment for a variety of conditions including but not limited to; chronic bronchitis, chronic obstructive pulmonary disease (COPD), hay fever, a lung condition called fibrosing alveolitis, head and neck cancer, and lung cancer. It is also used for treating some forms of epilepsy; ear infections; complications of kidney dialysis; chronic fatigue syndrome (CFS); an autoimmune disorder called Sjogrens syndrome; preventing sports injury complications; radiation treatment; increasing immunity to flu and H1N1 (swine) flu; and for detoxifying heavy metals such as mercury, lead, and cadmium. N-acetyl cysteine is also used for preventing alcoholic liver damage; for protecting against environmental pollutants including carbon monoxide, chloroform, urethanes and certain herbicides; for reducing toxicity of ifosfamide and doxorubicin, drugs that are used for cancer treatment; as a hangover remedy; for preventing kidney damage due to certain X-ray dyes; and for human immunodeficiency virus (HIV). Please note: The products offered are not intended to diagnose, treat, cure, or prevent any disease. Results are not guaranteed and may vary from individual to individual.