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N-acetylcysteine, or NAC, is a supplement that works in two ways: It provides cysteine, which is the rate-limiting amino acid for glutathione production It can also act as a direct antioxidant to scavenge ROS (NO2 and HOX)[ref][ref] The main antioxidant mechanism for NAC is by increasing glutathione levels
It is not approved for human or animal use, and may not be used in food, drugs, cosmetics, or diagnostic applications
The downside is that it costs more, and there are potential side effects
Foods with insufficient vitamin B12 Some people believe that certain plant-based foods are good sources of vitamin B12
Third, the discovery that MOTS-c also plays roles in immune regulation, particularly in suppressing innate immune overactivation, has opened research directions in inflammation-driven aging, autoimmunity, and potentially long-term sequelae of infections