David Sinclair· PhD
New study shows mitochondrial DNA content increases with age, especially over 45 & linked to methylation changes on both mitochondrial and nuclear DNA.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
New study shows mitochondrial DNA content increases with age, especially over 45 & linked to methylation changes on both mitochondrial and nuclear DNA.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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Interestingly, mtDNA copy number still rises with age. Is probably a compensatory response: as epigenetic drift weakens replication control, cells increase mtDNA copies to maintain energy output.