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In our study, supplementation with MSM induced an increase in GSH levels, as could be expected, since MSM metabolism provides one of the precursors needed for GSH synthesis, therefore counteracting GSH depletion

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Publisher USADA Accessed Jun 27, 2026 Study type Regulatory Document Limitations: Anti-doping guidance is not a medical evidence review, but it is highly relevant for athlete risk and prohibited-substance context

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