Off-label use means a doctor prescribes an FDA-approved drug for a different condition, age group, or dosage than officially approved. This is a legal and common practice
"GlyNAC supplementation in old mice improves brain glutathione deficiency, oxidative stress, glucose uptake, mitochondrial dysfunction." J Gerontol A Biol Sci Med Sci
Florian S, Krehl S, Loewinger M, Kipp A, Banning A, Esworthy S, Chu FF, Brigelius-Flohe R
Supplementing with high IV doses of glutathione have shown to improve protein, enzyme, and bilirubin levels in those suffering from fatty liver even several months after treatment interruption
Murakami T, Nishiyama T, Shirotani T, Shinohara Y, Kan M, Ishii K, Kanai F, Nakazuru S, Ebina Y
doi: 10.1097/bor.0000000000000456 21 MendelsohnDHWalterNCheungWHWongRMYSchnmehlRWinterLet al