SMRTR Science & EngineeringMay 14, 2026Reddit

Rebooting stem cells builds aged muscles and assists injury recovery

SMRTR summary

Aging muscles weaken partly because older muscle stem cells lack a key enzyme called glutaminase, which limits their ability to produce lipids needed for cell growth. In mice, researchers boosted aged stem cells with extra lipids in a lab, then reinjected them — resulting in 45% larger muscle fibers and better mobility. Scientists are now exploring similar lab-based stem cell treatments for older people to reverse age-related muscle decline.

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