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
There are many different symptoms of this deficiency
However, the idea of an anti-obesity medication is not new
110 Despite having a large sample size, the database lacked detailed patient information on lifestyle, physical, psychiatric, and laboratory examinations
Comprehensive toxicology studies found no lethal dose even at extremely high levels (20 mg/kg intramuscularly in rats, equivalent to approximately 1,400 mg for a 155 pound human)