NAC (N-acetylcysteine)

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 L-cysteine derived supplement that helps replenish glutathione levels. Glutathione is a main antioxidant that neutralizes free radicals, and helps detox. It also helps protect cellular components/mitochondria. When the liver goes through the process of breaking down 17-alpha-alkylated oral AAS (designed to pass first-pass digestion), it undergoes cellular and oxidative stress. Reactive metabolites are products of this process, which glutathione helps turn into a form that is able to pass via bile/urine. Can have an effect on lowering elevated liver enzymes when combined with other ancillaries. Oral glutathione is relatively unstable in the digestive tract, so NAC helps bypass this issue and help endogenously create glutathione instead.