Additionally, it improves carbohydrate metabolism, with fasting glucose decreasing by 14.6%, postprandial glucose by 19.1%, insulin by 2.3 times, and HOMA-IR index by 2.35 times, indicating reduced insulin resistance
doi: 10.1016/S0002-9610(99)80212-8
Glutathione is a naturally occurring antioxidant made of three amino acids cysteine, glycine, and glutamic acid produced primarily in the liver it plays a central role in neutralizing free radicals, supporting detoxification, and regulating melanin production in the skin when administered as an injection, glutathione is delivered directly into the bloodstream, bypassing the slower digestive breakdown that limits oral supplements this allows it to act faster and more effectively shifting melanin production toward a lighter pigment (pheomelanin) instead of the darker eumelanin, which gradually brightens and evens out skin tone
Adding vitamin B12 may help reduce certain side effects, like fatigue, for some people