Now Foods: NAC Critical Antioxidant 600mg, 250 caps

What the brand says

NOW Foods N-Acetyl Cysteine (NAC) is a stable form of the non-essential amino acid L-Cysteine. NOW Foods NAC N-Acetyl Cysteine is a sulfur-containing amino acid that acts as a stabilizer for the formation of protein structures, and is also necessary for the formation of Glutathione. Molybdenum and Selenium in Now Foods NAC N-Acetyl Cysteine are essential trace minerals that facilitate the production of several important enzymes. Critical Antioxidant. With Selenium & Molybdenum. Maintains Cellular Health.