Why NAD+ Boosters Like NR May Be a Double-Edged Sword for Muscle
Graded Preliminary — hypothesis-driven review of nearly 60 preclinical and clinical studies with no new data, and the proposed dual role of NAD+ rests mostly on cell and animal work rather than trials in people.
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This review suggests NAD+ precursors like NR may help muscle stem cells, but the effect depends heavily on dose.
Many people take NMN or NR hoping to fight age-related muscle loss. This review of about 60 studies says the story is more complicated. Moderate NAD+ boosting helped muscle stem cells repair and grow in lab and animal studies. But too much or poorly timed signaling actually exhausted those stem cells. Dose and context seem to matter a lot.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.
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