Increases levels of the antioxidant glutathione, an antioxidant responsible for:  Amino acids are the building blocks of proteins. N-acetyl cysteine comes from the amino acid L-cysteine. NAC is a precursor to L-glutathione, one of the most important antioxidants required for our well-being. Provide your body with ample NAC helps to ensure it can create enough of this powerful antioxidant. MEDICINAL INGREDIENTS – EACH CAPSULE CONTAINS: N-Acetyl-L-cysteine ………………………………… 500 mgNON-MEDICINAL INGREDIENTS: Magnesium Stearate, Microcrystalline Cellulose, Gelatin (Capsule). RECOMMENDED DOSE – (ORAL) ADULTS ONLY: Take 1 capsule 2 times per day with a glass of water. Take with meals providing protein.DURATION OF USE: Consult a health care practitioner for use beyond 6 months.CAUTIONS: Consult a healthcare practitioner prior to use if you are taking any drugs/ herbs/supplements; have a chronic liver disease; are taking nitrates for angina, or have a history of peptic ulcer disease. Discontinue use if you experience nausea, vomiting or diarrhea. Do not use if you are pregnant or breastfeeding, or have cystinuria. Avoid using if you are prone to forming renal stones.