Call 0554134915 Or WhatsApp 0555323376 N-acetyl cysteine (NAC) is an amino acid used to create proteins and is converted by the body into glutathione, a super-antioxidant.** Piping Rock is pleased to bring you our NAC 600 mg, a superior-quality formulation that delivers this key amino acid in coated caplets.** With Piping Rock NAC 600 mg, you are assured the best quality N-Acetyl Cysteine available -- at the best value on the market!