does glutathione bleach the Skin? Understanding Its Role in Skin Lightening Exposing dangerous glutathione 'skin whitening'

Indoor radon exposure and lung cancer risk: a meta-analysis of case-control studies

We found a beneficial effect of vitamin B 12 supplementation for 6 months on neurodevelopment in young North Indian children.16 In this study, where the children were supplemented daily with two recommended daily allowances (RDA) for 6 months, the effect of vitamin B 12 supplementation was more apparent in children who had evidence of vitamin B 12 deficiency at the start of the study

Glutathione (reduced glutathione, GSH) endogenous antioxidant molecule

Li Y, Chu TS (2017) DFT/TDDFT Study on the Sensing Mechanism of a Fluorescent Probe for Hydrogen Sulfide: Excited State Intramolecular Proton Transfer Coupled Twisted Intramolecular Charge Transfer

A study found that dietary supplementation with cysteine and glycine boosted glutathione levels

They are oral, regulated as supplements rather than injectables, and considered low risk