Fifty years of antioxidant trials mostly failed because 85% of mitochondrial DNA damage comes from replication errors, not free radicals. From mitochondrial transplantation and MOTS-c peptide hormones to CoQ10's irreplaceable role in the electron transport chain, aging science is moving from 'slow the damage' to 'replace the parts.
Telomeres are usually cast as the cell's countdown timer that hits zero and you age. But two studies show they manage far more than time: shorten them, and immune cells' mitochondria misfire, inflammation ignites, and cognition takes a causally-linked hit. Telomeres, it turns out, move both inflammation and brainpower.
The brain slows and dulls with age. Could a drug flip a single switch and turn that around? A 2026 review puts its bet on SIRT1, the NAD⁺-dependent enzyme whose depletion in the brain is tied to cognitive decline and dementia. Promising, but still far from a human prescription.
You took NMN for three months and still look the same in the mirror. Why? Three landmark studies piece together how NAD⁺ collapses with age: how cells fake hypoxia, who eats your supplements, and whether topping NAD⁺ back up can truly rejuvenate old cells.
We've heard plenty of mouse stories about NAD⁺ falling with age. Three studies finally move it onto real humans: a tube of blood, a brain scan, and a randomized double-blind trial each confirm NAD⁺ truly declines in us, while honestly flagging that the clinical payoff is still unsettled.
The pitch writes itself: as you age, cellular NAD+ levels decline, mitochondria lose their fuel, and muscles begin to waste away. Take NMN or NR daily, restore