Science-backed insights on longevity, biological age, and the training strategies that actually move the needle.
Thirty nights wearing an Oura ring and an Apple Watch at once. They agreed on when I slept to within minutes and disagreed about deep sleep by an hour.
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Your scale's body age is a body-composition estimate, not a verdict on how you're ageing. What each number measures, which one to trust, and what to do with the other.
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Trained specialists agree only "fairly" on which foods count as ultra-processed. What that means for the mortality evidence — and for your shopping.
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Ranked by the hardest human endpoint each one has actually moved — creatine and protein at the top, NMN and taurine at the bottom, and one genuine surprise.
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Melatonin is a clock signal. Magnesium is a nutrient top-up. Neither is a sedative — which is why the right pick depends entirely on which sleep problem you've got.
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NAD+ boosters reliably raise blood NAD+ and reliably fail on hard outcomes. Sort every human trial by endpoint quality and the effect vanishes on the way up.
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The only long-term human calorie-restriction trial prescribed 25%. Participants managed 12%. That gap is the most useful result in the whole study.
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Per minute, running wins. Per unit of effort, walking matches it. The real question isn't which is better — it's how many hours a week you've actually got.
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Five biological age tests, one body, one week — and a 14-year spread. What the disagreement is actually made of, and which number is worth tracking.
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The landmark Mediterranean diet trial was retracted in 2018, re-analysed and republished with nearly the same numbers. Here's what actually survived.
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Heavy sitting adds about 190 excess deaths per 100,000 a year. Heavy smoking adds over 2,000. The analogy fails on the arithmetic — but sitting still matters.
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Methylation kit, blood panel, or a stopwatch and a wall? Nine ways to measure biological age, ranked by evidence, repeatability and whether the number actually moves.
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An evidence-led 8-week plan built on the two levers with the best trial data — isometric wall squats and a sodium-for-potassium swap — plus how to measure whether it worked.
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Three years, 2,157 adults over 70, eight groups. DO-HEALTH tested the longevity starter pack against placebo and found nothing on its primary outcomes. Here's why.
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Fasting extends lifespan in mice and improves metabolic markers in humans. But no human trial has ever measured lifespan — and the mouse data now says health and longevity come apart.
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Sauna has 20-year mortality data. Cold plunging has mood, alertness and a documented cost to your strength training. If you only do one, it isn't close.
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Thirty days of nothing but easy cardio: what moved, what didn't, and why the measurements most people reach for can't see what's actually changing.
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Creatine's cognitive effect is real but conditional — it shows up in stressed, depleted brains and mostly vanishes in rested ones. The honest evidence.
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You don't have unlimited hours. Ranked by return on time, strength, Zone 2 and sleep beat the sauna, the cold plunge and the supplement drawer — here's the order.
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A concrete 12-week plan — three sessions a week of Zone 2 plus the Norwegian 4x4 — to move the single fitness number most tied to how long you'll live.
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Creatine or protein for keeping muscle as you age? They're not rivals — they do different jobs. But if you had to rank them, one is the floor and one is the multiplier.
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Collagen has a modest, real signal for skin and joints — and zero evidence for longevity. Here's what the trials actually show, and who's funding them.
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The 2018 JAMA study everyone cites for 'fitness predicts survival' — taken apart properly. What 122,007 patients really showed, and where the evidence stops.
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Zone 2 or intervals for a longer life? The honest answer is both — but most people underdo the easy stuff and overrate the hard stuff. Here's the split that works.
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Not all longevity metrics are equal. VO2 max, grip strength and walking pace predict who dies far better than the blood panels and wearable numbers people obsess over. Here's the ranking.
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Your standard cholesterol panel misses the number that best predicts heart disease. Here's why ApoB matters more for longevity — and how to lower it.
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Nuts are tied to ~20% lower mortality in large cohorts, and fewer cardiac events in a randomised trial. Here's the research — and how much to actually eat.
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Olive oil is the one Mediterranean-diet cliché with a serious evidence base. Here's what the mortality data and the PREDIMED trial actually show — and the swap that matters most.
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How long should you be able to stand on one leg? Age-by-age hold times, the 10-second test that predicts mortality, and how to train your balance.
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Fermented foods sound like a wellness fad, but the research on microbiome diversity and inflammation is surprisingly good. Here's what the evidence says — minus the kombucha hype.
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Visceral fat wraps around your organs and quietly drives inflammation, insulin resistance, and mortality risk — even at a normal weight. Here's the science and how to measure it.
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Mild chronic dehydration may quietly accelerate aging. Here's what serum sodium research reveals about hydration and longevity — and how much water you actually need.
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Ultra-processed foods now make up over half of many Western diets. Here's what the research says about UPFs, mortality, and aging — and how to cut back without joining a cult.
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The cardioprotective glass of red has quietly fallen apart. Here's what the research actually says about alcohol, aging, and where the real risk sits.
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Blood pressure is the single biggest modifiable risk factor for early death worldwide. Here's what the research says and how to actually lower yours.
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A 60,000-person study found sleep regularity predicts mortality better than sleep duration. Here's what consistent sleep timing does to how you age.
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Sitting for hours a day raises mortality risk even if you exercise. What the research says about sedentary time — and how to break it up.
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Moderate coffee drinking is linked to lower mortality and slower aging across huge cohort studies. Here's what the research actually says about coffee and longevity.
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How fast you walk is one of the most validated predictors of how long you'll live. Here's what the research says, what a 'good' pace looks like, and how to train it.
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Roughly half of adults don't get enough magnesium, and a normal blood test won't catch it. Here's what the research says about magnesium, ageing, and how much you need.
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Fiber gets none of the hype protein and omega-3 enjoy, yet it shows up in mortality data again and again. Here's what the research says — and how much you actually need.
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Breathing and longevity: nasal vs. mouth, breathing rate and CO2 tolerance have measurable effects on your HRV, your sleep and how fast you age.
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The trillions of microbes in your gut regulate inflammation, influence biological age, and look dramatically different in centenarians. Here's what the research actually says — and what to do about it.
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Creatine is the most-researched supplement there is — and most of its benefits for healthy aging have nothing to do with bulking. What the science says.
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Around 40% of Europeans are vitamin D deficient — and most don't know it. Here's what the research shows about vitamin D, biological ageing, and how much you actually need.
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Omega-3s reduce chronic inflammation, slow telomere shortening, and cut cardiovascular mortality. Here's what the research shows — and how much you actually need.
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A simple floor test predicts all-cause mortality more accurately than most clinical measures. Here's the research on mobility, flexibility, and longevity — and what to actually do about it.
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Inflammaging is the persistent, low-grade inflammation that accumulates with age and underlies most age-related disease. Here's what the research says and how to slow it down.
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Chronic stress accelerates the biological processes that drive ageing — via telomere shortening, allostatic load, and HRV suppression. Here's what the research shows and what actually helps.
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Resistance training reduces all-cause mortality, preserves the muscle that protects you in old age, and improves nearly every biomarker of biological aging. Here's what the science says — and a practical protocol.
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Elevated blood glucose accelerates biological aging well before diabetes develops. Here's what the research shows about blood sugar, glycation, and how to improve your metabolic health.
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Time-restricted eating compresses meals into a daily window. Here's what the research shows about metabolic health, autophagy, aging — and what a practical protocol actually looks like.
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The 0.8g/kg protein RDA was never a longevity target. How much protein you need by age — 40s, 50s, 60s and beyond — with the grams worked out per bodyweight.
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Ice baths and cold plunges have real physiological effects — brown fat activation, norepinephrine spikes, improved metabolic health. Here's what the research shows and what it doesn't.
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A 20-year Finnish study of 2,315 men found regular sauna use reduced sudden cardiac death by 66%. Here's the evidence, the mechanisms, and how often you actually need to go.
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Grip strength is one of the most validated predictors of all-cause mortality. Here's what the research actually says, what a 'good' number looks like, and how to train it without a dedicated grip programme.
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Heart rate recovery — how fast your pulse drops in the first minute after exercise — is one of the strongest independent predictors of all-cause mortality. Here's what the research says and how to train it.
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The 10,000-step target was a 1960s marketing slogan, not a research finding. Here's what the longevity studies actually say about step counts, pace, and age.
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The research on food and ageing, without the wellness theatre. What the Mediterranean, Blue Zones, and fasting studies actually show — and how to eat without joining a cult.
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Resting heart rate is one of the most predictive — and most underrated — longevity biomarkers. Here's what the research says and how to lower yours.
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Sleep is one of the strongest levers for ageing well. Here's the mortality curve, what's happening underneath, and how much sleep adults actually need.
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Skeletal muscle is one of the strongest predictors of how well you age — stronger than BMI, stronger than blood pressure. Here's the research, the numbers, and how to actually build it.
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Zone 2 is the lowest-glamour, highest-impact training for longevity. Here's what it actually is, why mitochondria care, and how to find your zone without a lab.
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Heart rate variability (HRV) is one of the strongest biomarkers of autonomic health and aging. Here's what the research says about HRV, why it declines with age, and how to improve yours.
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Chronological age counts years since birth; biological age measures how well your body is actually aging — and "body age" on your scale is only one part of it. What the science says and how to track it.
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Zone 2 cardio, strength, VO2 Max intervals and stability — the four pillars of longevity training, and how each one adds healthy years.
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VO2 max is the fitness number most tied to how long you live. What it is, what counts as a good score for your age and sex, and why it predicts survival.
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