Why NAD+ Boosters Like NR May Be a Double-Edged Sword for Muscle
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.
Topics
Related Studies
All researchRegular Exercise May Rewind the Molecular Clock in Aging Muscle
In older adults, muscle showed lower activity in genes tied to energy production compared to younger people.
Even Light, Unsupervised Exercise Improves Balance in Frail Older Adults
Older adults with muscle loss got noticeably steadier on their feet after doing exercise.
NAD Sprayed Up the Nose Helped Mice Regrow Their Sense of Smell
A form of NAD delivered through the nose helped restore lost smell in mice and pushed stem cells to become new smell neurons.