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

2008 Mar-Apr;19(2):102-7

J Anim Sci Biotechnol 5(1):34, doi:10.1186/2049-1891-5-34 Wu G, Bazer FW, Burghardt RC, Johnson GA, Kim SW, Knabe DA, Li P, Li X, McKnight JR, Satterfield MC, Spencer TE (2011) Proline and hydroxyproline metabolism: implications for animal and human nutrition

[DOI] [PMC free article] [PubMed] [Google Scholar] [14].Shoenfeld Y

This NO modulation affects blood flow, inflammation, and cellular signaling throughout healing tissues

When taken as a supplement, it may help brighten skin tone, reduce pigmentation, and promote a more even, youthful complexion by protecting collagen and cellular health