nac glutathione reaction N-Acetyl Cysteine (Glutathione Precursor) NAC and intracellular B12 processing:

This specific peptide bond protects GSH against cleavage by intracellular peptidases preventing its hydrolysis and making GSH moderately stable in the cell

It is not scheduled as a controlled substance by the DEA and is not explicitly named in the Designer Anabolic Steroid Control Act of 2014, though federal prosecutors have pursued unapproved-new-drug and misbranding cases against vendors marketing peptides for human performance use

This makes pharmacovigilance an important area of focus

As obesity is often associated with gynecomastia, body mass index should be documented (56)

10.3390/cancers17010059 Cancers 97 NejmanD.LivyatanI.FuksG.GavertN.ZwangY.GellerL.et al (2020)

Although the mechanisms are unclear, multidrug resistance protein 1 (otherwise known as ABCC1) has been reported to preferably export GSSG under conditions of high intracellular GSSG (33, 34)