why take nac instead of glutathione N-Acetyl Cysteine (NAC) and Glutathione-Comprehensive Guide Effect of N-Acetylcysteine on Sleep:

Product suggested doses range from one to four doses per day for a total of 600 mg to 3,000 mg daily

Manufacturers remove the water so the peptide stays stable in transit and storage

Relevant and representative analytes from the classes of stimulants/new psychoactive substances (10 analytes), narcotics (4 analytes), synthetic cannabinoids (5 analytes), corticoids (3 analytes), and beta-blockers (5 analytes) were used to establish an initial testing method targeting specifically those drugs prohibited in-competition only

Role for glutathione peroxidase-4 in brain development and neuronal apoptosis: specific induction of enzyme expression in reactive astrocytes following brain injury

Dalvi RR (1992)