Box of 60 or 120 capsules of N-acetyl-cysteine from biofermentation. Our N-Acetyl-Cysteine (NAC) capsules are pure and highly dosed: 600mg/capsule (no fillers, no excipients, no additives). N-Acetyl-Cysteine (NAC) is a dietary supplement that is transformed into L-Cysteine once in the human body. L-cysteine is an amino acid involved in the synthesis of glutathione, but also in human tissues, mainly hair, skin, and nails. In fact, keratin, which is the main constituent of hair, is composed of proteins that contain up to 17% L-cysteine. All of our food supplements are suitable for vegetarians and vegans. New generation premium vegetable capsule of natural origin (pullulane).