NMN is sold as a cellular-energy booster, but a new muscle-biopsy study found a surprising tradeoff. After a damaging blood flow restriction workout, 1,200 mg/day of NMN suppressed inflammatory signals like TNF-α and IL-10. It also delayed a repair-related marker and erased the 171% mitochondrial increase seen with placebo. The study is tiny (11 untrained young men), so it can't settle anything. It does challenge the assumption that less post-workout inflammation is always better.
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