The PCACs role is advisory: it provides recommendations to FDA, but does not make binding decisions
These findings are exciting because antioxidant molecule glutathione correlates with the measurable form of vitamin D
The two used for injections, hydroxocobalamin and cyanocobalamin, have different storage rules, and getting them mixed up is the usual source of confusion
The problem is that the digestive process, particularly stomach acid and the enzyme gamma-glutamyltransferase present in the gut lumen, can cleave glutathione into its constituent amino acids (glutamate, cysteine, glycine) before it is absorbed intact
But youre also rightfully cautious
doi: 10.3390/biology11020288