N-ACETYL-L-CYSTEINE (NAC) has a biological half-life of 11/2 hours in the bloodstream.
Jarrow Formulas NAC SUSTAIN will release in the small intestine over a 2-4 hour period in order to maintain blood levels over a longer period of time.
As an amino acid and antioxidant, NAC is a precursor to the critical antioxidant glutathione, which is produced primarily by the liver.
