Yes, glutathione is legal to purchase in the United States when sold as an oral dietary supplement under FDA regulations governing DSHEA (Dietary Supplement Health and Education Act)
In rare cases, it caused [30, 12, 54, 18, 91]: Upset stomach Vomiting Diarrhea Headache Insomnia Our bodies partly metabolize carnitine into trimethylamine-N-oxide (TMAO), which may promote plaque build-up in blood vessels (atherosclerosis)
Gerster-Gilliron, K
Pharmacological inhibition of cystineglutamate exchange induces endoplasmic reticulum stress and ferroptosis
[DOI] [PMC free article] [PubMed] [Google Scholar] 12.Zan P., Than A., Zhang W., Cai H.X., Zhao W., Chen P
injection of the IgG1 teprotumumab (Tepezza) is an approved therapeutic with this mode of action [405,406,407], and others are in development (veligrotug, VRDN-002, IBI311, and ZB001 [NCT05480579, NCT05176639]) [408, 409]