If you search online for how to achieve longevity, the results you’ll receive are likely to be split cleanly into two camps.
One is full of cold plunges, exotic supplements and biohacking routines that cost more than most mortgages. These go from sensationalised claims with perhaps a grain of truth to them to the outright outlandish - remember the billionaire who went viral for swapping blood with his 17-year-old son in hopes the plasma would keep him younger for longer? That sort of thing.
The other, far less likely to dominate headlines but considerably better supported, is a short list of habits that keep showing up across decades of population research: moving regularly, eating well, sleeping properly, and staying connected to other people.
None of these longevity habits are new information. What's changed is how precisely researchers can now measure the effect of each one - and the numbers are, in places, startling.
Exercise: the dose that actually matters
A 2025 analysis in The Lancet Public Health pinned down a genuine sweet spot for daily steps: around 7,000 a day. This is the point at which the risk of cardiovascular disease, type 2 diabetes and depression all drop sharply, alongside a 47% lower risk of death from any cause.
Beyond that figure, the extra benefit tends to level off, which is a relief for anyone who has ever felt guilty about not hitting five figures on a fitness tracker!
There’s more to the role of exercise in slowing ageing (C9) than walking alone. Muscle matters more than people think, and more so the older you get. Low muscle strength has been linked to roughly double the mortality risk, in studies covering almost two million people. The fix doesn't need to be elaborate: wall squats, planks, a few minutes of resistance work most days. Research puts the minimum effective dose at around 21 minutes a week, which is less time than most people spend deciding what to watch on television.
Sleep and the body's repair window
Sleep gets treated as optional once people start obsessing over diet and exercise. That's a mistake, and the specific daily habits around sleep and exercise that support healthy ageing are worth a proper look on their own.
There's also the overnight fasting window to consider. Going 12 to 14 hours without food has been strongly linked to markers of healthy ageing, largely because it tips the body from burning carbohydrate to burning fat and kicks off repair processes, your mitochondria included.
The two line up neatly, if you let them. A late dinner eats into both the fasting window and the hours left for sleep, which is probably why "eat earlier" keeps turning up in longevity research, however unglamorous it sounds.
Diet, minus the faddishness
Of the four, nutrition has by far the most research behind it, and the Mediterranean diet remains the pattern with the strongest evidence: vegetables, legumes, wholegrains, olive oil, fish over red meat. The nutritional case for why this particular pattern supports ageing well covers the full picture, but the short version is lower inflammation, healthier blood vessels, and a reduced risk of several age-related diseases.
There’s a short list of foods that are worth limiting rather than banning outright. Processed meats and alcohol are the only two dietary elements with a proven, direct link to cancer. Refined sugar and sweets are tied to faster cancer progression and to cognitive decline. None of it calls for perfection, just weighting the scales more often than not.
The habit people underrate most
Social connection doesn't get the credit it deserves. A landmark meta-analysis, 148 studies, over 300,000 people, found strong social relationships raised the likelihood of survival by 50%, a protective effect roughly on par with quitting smoking and bigger than the effect of inactivity or obesity.
Nothing complicated keeps this one going: seeing family and friends regularly, a community or faith group, just not living in isolation. It’s something that many centenarians have in common and sits right alongside diet and movement rather than trailing behind as an afterthought.
Putting it all together
Exercise, sleep, diet, connection - none of them do much heavy lifting alone. Eat well but sleep badly, and the repair work you're relying on never quite happens. Exercise diligently in isolation, and you're skipping one of the biggest protective effects researchers have ever measured. A wider look at how all the pieces of healthy ageing fit together goes into how these threads connect.
The encouraging part is that none of it demands extremes, much less taking blood from a teenager. A brisk walk, dinner a bit earlier, a plate weighted towards colourful plant foods and olive oil, time spent with people who matter. Unglamorous, repeatable, and backed by considerably more evidence than most things sold as a longevity breakthrough.
Part of a Series
This article is part of series on staying healthy as you get older and improving your quality of life.
It’s not only a goal almost everyone shares, but has huge implications on national healthcare spending, productivity and economic resilience.
It strongly recommends the Mediterranean diet as the best way of eating but recognises that maintaining strength and aerobic fitness is also a critical part of a healthy ageing lifestyle.
It also suggests a supplement to help reach the increased plant nutrient levels that you need as you get older.
DailyColours® contains 161 plant nutrients – nutrients that are missing from an ordinary vitamin and mineral pill. Clinical trials show that it offers Mediterranean diet benefits in a daily supplement. You can see it here.
Note: The content on this site is intended for general wellness and informational purposes only. It is not personalized medical advice. Consult a healthcare professional before making any changes to your diet, exercise, or lifestyle routines.
Author: Colin Rose
Colin Rose BSc is a health and longevity researcher and author with more than 30 years of experience researching healthy ageing, nutrition, and longevity. He is a Fellow of the Royal Society of Arts and a Senior Associate of the Royal Society of Medicine.