glutathione metabolism disorder Apoptosis and glutathione: beyond an antioxidant Full article: Gut microbiota-regulated glutathione

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Safety and side effects: A meta-analysis of multiple studies in COPD patients showed no significant adverse effects at doses ranging from 600 mg to 3g/day.[ref] Studies in healthy adult athletes go up to 20g/day (not recommending this, just including it for safety).[ref] Conversely, in Parkinsons patients, there was a high number of adverse events at 6g/day of NAC

The Shoulder The deltoid muscle in the shoulder is another popular site for intramuscular B12 injections

Mutations of these genes lead to abnormally high incidence of cancer

The problem starts when its used repeatedly, in high doses, for a purpose it was never officially approved for - changing natural skin color