Animal study · Supplements / medicine · 28 Oct 2026
Aging muscle traded strength for protection when a mitochondrial fat fell
Source: ScienceDaily
What the research found
ScienceDaily reported on 28 October 2026 a Nature Aging paper from the University of Copenhagen (DOI 10.1038/s43587-026-01227-7). Cardiolipin, a fat in the inner mitochondrial membrane, was lower in muscle from aging or diseased mice and from people. Lowering it in young mice shifted fibers from fast-twitch toward slow-twitch, the pattern seen in older muscle. Restoring it to about two-thirds of the usual level began to reverse wasting and prevented the premature deaths in those animals. The shift looks like a trade of power for protection: when an antioxidant mopped up reactive oxygen species, the fiber change was smaller and the muscles fared worse. Human samples showed the decline. The rescue experiments were in mice. Elamipretide has accelerated approval for Barth syndrome, a rare disease, and that approval is not evidence for ordinary age-related muscle loss. Not medical advice. Not a substitute for a prescribed medicine.
Evidence level: Animal study. Results in animals or cells often don't carry over to people.
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