A recent randomized, double-blind, placebo-controlled pilot study compared intravenous NR (500 mg), NAD+ (500 mg), oral NR (500 mg), and saline placebo [5]
Leafy Greens (Spinach, Kale) Serving size : 1 cup raw Vitamin C content : 3080 mg These vegetables are loaded with chlorophyll, which may increase collagen precursors in the skin, and also provide key vitamins and minerals
Additionally, DSIP appears to be regulated by glucocorticoids, and its signaling may interact with the MAPK cascade through homology with glucocorticoid-induced leucine zipper (GILZ), suggesting potential roles in cellular stress responses
However, there are also several other plant sources that are abundant in sulfur that can supplement your glutathione intake