Longevity & Healthy Aging
The science of living well longer, not just living longer. We examine the evidence on healthspan, biological aging, the supplements attracting serious research attention, and the lifestyle factors with the strongest track records, so you can separate durable signal from the noise.
Understanding longevity science
Longevity research has shifted its framing over the past decade. The goal is no longer simply adding years to life but preserving the physical and cognitive function that make those years worth having. The term healthspan captures that distinction: the period of life spent in good health, free from serious disease or disability, rather than total lifespan at any cost.
Several molecular hallmarks appear to drive biological aging (genomic instability, epigenetic alterations, mitochondrial dysfunction, cellular senescence, and stem cell exhaustion among them). These are not independent, and no single intervention addresses all of them. That caution matters when evaluating the longevity supplement market, which tends to favour single-target narratives for commercial reasons.
The interventions with the strongest evidence remain unsurprisingly unglamorous: consistent aerobic and resistance exercise, adequate and well-timed sleep, a diet rich in whole foods with controlled energy intake, not smoking, and maintaining social connection. Each acts on multiple aging pathways simultaneously and has robust human data behind it.
Emerging candidates (NAD+ precursors, senolytics, rapamycin, and bioregulator peptides like epitalon) show genuine promise in preclinical models and early human data. Across this hub we track what the evidence actually supports at each stage, distinguishing robust findings from plausible hypotheses from outright speculation.
Longevity & Healthy Aging articles
This hub just opened, so coverage is still thin. More evidence-based guides on healthspan, biomarkers, and the science of living well longer are in development.
VO2max and longevity: what cardiorespiratory fitness predicts
A cohort of more than 122,000 adults undergoing exercise treadmill testing found cardiorespiratory fitness among the strongest predictors of survival researchers measured, with no upper limit of benefit.
Sleep and longevity: what the evidence shows
A pooled analysis of more than 1.3 million adults found both short and long sleep duration associated with higher mortality, a U-shaped pattern. We explain why the two ends of that curve do not mean the same thing.
More on the way
We would rather publish one well-sourced article at a time than pad this hub with placeholder links. In the meantime, our Recovery & Tissue Repair hub is fully live with in-depth, evidence-based guides, or browse all published articles.
Frequently asked questions
Short, evidence-based answers to the questions we hear most.
Can supplements meaningfully extend lifespan?
No supplement has been shown to extend human lifespan in a controlled trial. Several compounds (including rapamycin, metformin, NAD+ precursors, and senolytics) show compelling signals in animal models or observational data, but none have cleared the bar of a randomised human longevity trial. They may support specific biomarkers of healthspan, which is a more defensible and clinically meaningful goal.
What is the single most impactful thing I can do for longevity?
The evidence most consistently points to cardiorespiratory fitness, measured as VO2max, as the strongest modifiable predictor of all-cause and cardiovascular mortality. Improving it by one fitness category carries a risk reduction larger than most drugs achieve. Resistance training, not smoking, adequate sleep, and social connection cluster closely behind.
Are epigenetic age tests worth paying for?
Epigenetic clocks correlate with chronological age and predict some disease risks at a population level, but individual-level precision is still limited. They can provide a motivating baseline and show directional change after lifestyle interventions, but interpreting a single result as your definitive biological age overstates the current science. Use them as one signal among many.
Is fasting necessary to get autophagy benefits?
Autophagy (cellular cleanup) is upregulated by fasting, caloric restriction, and exercise, but the thresholds in humans are not well characterised. Most evidence for meaningful autophagy induction in humans comes from multi-day fasting or severe restriction, not the 16:8 intermittent fasting windows popular in wellness circles. Exercise appears to be a more accessible and better-studied trigger for many people.
The evidence digest
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Educational content only. Not a substitute for medical advice.