6 health benefits of glutathione Natural Factors N Acetyl L Cysteine 500mg Body Energy Club N Acetyl Cysteine supplementation lowers high homocysteine plasma levels and increases Glutathione synthesis in the trans sulfuration pathway Italian Journal of Medicine Glutathione IM The Center Medical As I mention in my book, N acetyl cysteine (NAC) is not found in food sources, but in the body, it converts into cysteine. NAC acts as a precursor to glutathione, a powerful Liposomal Glutathione as a Potential Therapeutic Agent to Control HIV 1 Infection and Tuberculosis European Medical Journal