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After about 1.5 years, I was not seeing any progress in the gym

Not without accepting significant potency loss

R Substrates acetylated by NATs include: Aromatic amine carcinogens (beta-naphthylamine, 4-aminobiphenyl, benzidine) Caffeine (partially, via NAT2) Dapsone Hydralazine Isoniazid (tuberculosis drug) Para-aminosalicylic acid (PABA) Procainamide Sulfonamide antibiotics Acetylation can also produce bioactivation

The rate-limiting step in extracellular GSH catabolism is controlled by -glutamyltransferases (GGTs), which cleave the -glutamyl bond in GSH to release glutamate and dipeptide cysteinylglycine