Information Reviews Ask Dr. Dan Product Description Neurobiologix N-Acetyl-L-Cysteine supports detoxification, and antioxidant protection. Glutathione precursor. Recommended Use: Take 1 to 2 capsules daily, or as directed by a healthcare professional. Label Information Neurobiologix N-Acetyl-L-Cysteine Facts: 1 capsule contains: N-Acetyl-L-Cysteine (NAC) 500 mg Other Ingredients: Vegetarian capsule (hydroxypropyl methylcellulose, water), microcrystalline cellulose, ascorbyl palmitate, and silicon dioxide.