N-Acetyl-L-Cysteine (NAC) is a highly stable form of cysteine and is a precursor in the body to the critical antioxidant glutathione. It provides antioxidant support and helps to promote healthy immune system function.* Natural Factors amino acids are the highest quality pharmaceutical grade products available.
Isura: 
Non-GMO: Documentation ✔
Mass Spec: Lab Tested ✔
Suggested Use
1 capsule, 2-3 times per day or as directed by a health professional.
Other Ingredients
Rice powder, vegetarian capsule (carbohydrate gum [cellulose], purified water), magnesium stearate (vegetable grade).
Contains no artificial colors, preservatives, or sweeteners; no dairy, sugar, wheat, gluten, yeast, soy, corn, egg, fish, shellfish, salt, tree nuts, or GMOs.
Manufactured by Natural Factors to ensure safety and potency in accordance with the Good Manufacturing Practices (GMP), of the FDA and Health Canada.