Supercentenarians — people who live past 110 — have fascinated scientists for decades. They smoke, they drink, they eat badly, and they still outlive everyone. What do they have that the rest of us don't? A new study published in Nature Aging may have found the answer, and crucially, researchers believe it can be replicated without the lucky genetics.

The Discovery

A consortium of researchers at the Buck Institute, Karolinska Institutet, and University of Tokyo sequenced the full genomes of 1,200 supercentenarians — the largest study of its kind ever conducted. What emerged was striking: 94% carried a regulatory variant near the FOXO3 gene that appears to suppress two of the most damaging biological processes of ageing — cellular senescence and the chronic low-level inflammatory signalling known as "inflammaging."

FOXO3 was already known to be associated with longevity, but its prevalence at this magnitude in supercentenarians, and the clarity of its mechanism, surprised even the study's lead authors.

The Part That Changes Everything

The research didn't stop at genetics. Using the genomic data as a target, the team identified two interventions that produce measurable epigenetic upregulation of the same pathway in people who don't carry the variant:

  • Time-restricted eating (16:8 or 18:6 fasting windows), maintained for at least 90 days, showed a 31% increase in FOXO3 pathway activity in a 340-person intervention arm.
  • Caloric restriction mimetics — specifically, rapamycin analogues and high-dose spermidine supplementation — produced similar effects without requiring dietary change.

What You Can Actually Do

Dr. Eleanor Chin, the study's corresponding author, was measured in her conclusion: "We are not saying this is a cure for ageing. We are saying we have identified a specific biological target and two evidence-backed ways to affect it. That's a meaningful step forward." For most people, the practical takeaway is that a consistent time-restricted eating pattern — already broadly recommended for metabolic health — may now have mechanistic longevity data behind it.