From the Manufacturer:
N-Acetyl Cysteine [Circulatory, Glandular, Immune] is essential for the body to mount a defense against free radicals, and it supports the natural elimination of harmful toxins. This nutrient is a precursor to glutathione, one of the body’s most powerful antioxidants. Consequently, N-acetyl cysteine can step up the body’s own efforts to combat oxidative stress and damage. N-acetyl cysteine protects healthy cells against damage from oxidative stressors. Its principal benefits include protecting the liver, cardiovascular system, skin and eyes. NSP N-Acetyl Cysteine contains turmeric for added liver support.