Mitochondria are an important source of ROS in most cells
Since GSH is not carried inside the cell, exogenously administered GSH is most likely to act by increasing plasma GSH levels reducing luminal oxidative stress and increasing NO bioavailability in patients with endothelial dysfunction (220)
Typically, as a subcutaneous injection once daily, usually in the evening
Glutathione is a small protein that is formed naturally in the body when the amino acids cystine, glycine and glutamine combine under the thiol (sulphur) group
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Liao B, Zhao Y, Wang D, Zhang X, Hao X, Hu M. Nicotinamide mononucleotide supplementation enhances aerobic capacity in amateur runners: a randomized, double-blind study. J Int Soc Sports Nutr. 2021;18(1):54. Published 2021 Jul 8. doi:10.1186/s12970-021-00442