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J., Drevet, J

In the brain and body, glutamine contributes to: Nitrogen transport between tissues Regulation of acid-base balance Gluconeogenesis (production of glucose from non-carbohydrate sources) Serving as a precursor to nucleotide bases and the antioxidant glutathione (Castell et al., Nutrition ) These functions highlight the importance of maintaining adequate glutamine levels, especially when under metabolic stress or physical exertion

Published research compares NAC, oral glutathione, and sublingual glutathione head-to-head (Schmitt et al., 2015)

Following melatonin treatment, the SCORAD decreased by 9.1 points compared to placebo (from 49.1 to 40.2)

Thus, despite increasing NO availability, short-term CIT provided no measurable ergogenic benefit for respiratory function in this population (46)