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 researchFor Older Muscle Quality, Lifting Weights Beat Supplements and Cardio
Looking at dozens of trials in adults over 60, resistance training was the only thing that clearly improved muscle quality (strength…
Why Low NAD+ May Push Insulin-Making Cells Into Self-Inflicted Inflammation
In cells and animals, oxidative stress drained NAD+ inside the insulin-producing cells of the pancreas, flipping a chemical switch that set…
Low B Vitamins May Be a Hidden Driver of Age-Related Muscle Loss
Muscle loss with age is usually blamed on too little protein or exercise, but B vitamins may play a role too.