Prowise NAC supplement UK manufactured is an amino acid that supports the production of the powerful antioxidant glutathione. N-Acetyl Cysteine is a stable form of L-Cysteine, a non-essential amino acid. It acts as a stabilizer for the formation of protein structures, and it also promotes the production of glutathione. Prowise NAC capsules are manufactured in the UK to the GMP code of practice. Suitable for vegetarians and vegans.