is it glutathione safe safe? If it's which is the best one to buy? : r/IndianSkincareAddicts Injectable Glutathione

I also have fibromyalgia so it is really hard to figure what is causing what with me. I really would like to know if B12 at 4000 can be harmful or be a sign of something being wrong

[2] Exposure to nitrous oxide (including recreational use) can cause functional B12 deficiency and worsen neurological manifestations

Both GSSG and GSSR can be catalytically reduced back to GSH by the NADPH-dependent GSH reductase and thioredoxin (Trx)/glutaredoxin (Grx) system, respectively

No changes in fasting glucose, insulin, HbA1c, IGF-1, cortisol, or thyroid hormones were detected at any dose tested

[DOI] [PMC free article] [PubMed] [Google Scholar] 148.Prasad C, Imamura M, Debata C, Svec F, Sumar N, Hermon-Taylor J

Vitamin B12 is found in meat, fish, eggs, and milk but not in fruit or vegetables