NAC (N acetyl cysteine) is a powerful compound that plays an important role in supporting the body's natural detoxification and antioxidant systems. One of its key functions is helping the body produce glutathione, The neuroprotective effects of N acetylcysteine in psychiatric and neurodegenerative disorders: From modulation of glutamatergic transmission to restoration of synaptic plasticity ScienceDirect Effects of N acetylcysteine, oral glutathione (GSH) and a novel sublingual form of GSH on oxidative stress markers: A comparative crossover study. ScienceDirect Amazon.com: Designs for Health NAC 900mg N Acetyl L Cysteine, Antioxidant Glutathione Precursor Detox + Workout Recovery Support Non GMO + Gluten Free Supplement (120 Capsules) : Health & Household Glutathione and NAC Reduce the Severity of COVID 19