glutathione and free radicals their impact on health and antioxidant defenses: a review Oxidative stress and free radicals

Yes, it is generally safe to take L-cysteine or NAC daily at recommended doses (usually 600-1,200 mg/day for NAC), but long-term use should be monitored by a healthcare provider, especially if you have kidney or liver conditions

doi: 10.1097/TP.0000000000001895 63 BergerMLefaucheurCJordanSC

See more Intravenous infusions or injections are not prohibited if they are legitimately received in the course of a hospital treatment, surgical procedure or clinical investigation or if they do not exceed 100 mL per 12 hour period

(2023) 147(8):e93e621

Since GSH is produced in the cytosol but is also required by mitochondria, a transport into the mitochondria is needed