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- Free Form Amino Acid
Twinlab NAC (N-Acetyl-Cysteine) Capsules are easier to swallow and assimilate. They also contain no tablet binders, coatings or colorings. N-Acetyl-Cysteine is a precursor of glutathione in the body and a protected sulfur-containing amino acid. it is more stable than the sulfur-containing amino acid L-Cysteine.