NAC (N-Acetyl L-Cysteine) is an acetylated non-essential amino acid that has many nutrient benefits for health and performance.
 
Growing research over the past few years has further increased NAC's popularity due to its many different roles in the body.  In your body the Cysteine (from NAC) combines with Glycine and Glutamine to produce a powerful tri-peptide antioxidant called glutathione. Antioxidants like glutathione help to reduce free radical damage of cells in the body and support healthy immune response.
 
Vigorous exercise decreases your bodies amino acid stores and may increase the risk of upper respiratory infections. NAC may help to support your nutrient needs.