Why do some people age so much slower than others?

Some people genuinely age more slowly than others, and the difference comes from a mix of genetics and lifestyle, with lifestyle doing more of the work than most people expect. Your genes set part of your ageing tendency, but how you live, your sleep, movement, diet, stress, and habits, powerfully influences the actual pace at which your body wears over time. This is why two people the same age can look and feel a decade apart, and why slowing your own ageing is more within reach than the lucky-genes story suggests.

Why it happens

We all know them. The person who seems to barely change across the years, who stays energetic, sharp, and well into an age when others have visibly slowed. It is tempting to write them off as simply genetically blessed, winners of a lottery the rest of us lost. There is some truth in that, genetics does play a role, but it is far from the whole story, and the parts that are not genetic are exactly the parts you can do something about. Two ages, not one. Start with a distinction that reframes everything. You have a chronological age, the number of years since your birth, and a biological age, a measure of how worn or well-maintained your body actually is at the cellular level. These two can drift apart substantially. Someone can be sixty by the calendar but considerably younger biologically, or the reverse. The person who 'ages slowly' is really someone whose biological age is running behind their chronological age. And crucially, while you cannot change your birthday, your biological age is partly shaped by factors within your control. Scientists can increasingly estimate biological age through markers like patterns of chemical tags on your DNA, the epigenetic clocks now moving into mainstream wellness. The important finding is that faster biological ageing is associated with higher risk of disease, while a slower pace tracks with better long-term health. What genetics actually contributes. Genetics does influence ageing in several ways. Some people inherit variants associated with longevity and slower ageing, which is why exceptional long life and good late-life health tend to cluster in certain families. Genes influence how efficiently your body repairs damage, manages inflammation, and maintains its cells over time. But here is the essential caveat the lucky-genes story conveniently ignores. Genetics is generally estimated to account for only a portion of how we age, with research often suggesting that lifestyle and environment account for the larger share of the variation in healthy ageing. The hand you are dealt matters, but how you play it matters more. Genetics sets a tendency. Your life largely determines whether you age toward the faster or slower end of what your genes permit. The factors that actually move the needle. This is where the slow-ageing person's 'secret' usually turns out to be unglamorous and entirely learnable. Regular physical activity is one of the most powerful, associated with slower ageing across multiple body systems. Quality sleep is when much of the body's repair and maintenance happens, and chronically poor sleep accelerates ageing. A diet built around whole foods, with plenty of plants and fibre and less ultra-processed food, sugar, and excess, supports a slower pace. Managing chronic stress matters, because sustained stress is associated with faster biological ageing. Not smoking and moderating alcohol protect against some of the most reliable accelerators of ageing there are. And maintaining strong social connection and a sense of purpose is consistently associated with healthier, longer life. The India angle. This carries particular weight in the Indian context, where conditions linked to accelerated ageing and earlier metabolic decline, type 2 diabetes and heart disease especially, often arrive earlier than in many other populations. The modern shift toward more processed food, more sitting, high stress, and often poor sleep pushes biological ageing in the wrong direction precisely where the metabolic starting point is already more vulnerable. The flip side is that the protective factors are equally available, and India's traditional strengths, diverse plant-rich diets, strong family and social bonds, can be genuine assets in ageing well. Beware the anti-ageing industry. The market is full of expensive supplements, treatments, and protocols promising to reverse or dramatically slow ageing, most of which run far ahead of what the evidence actually supports. The genuinely proven levers are the unglamorous lifestyle fundamentals, not a pill or a premium regimen. Be especially skeptical of anything promising to reverse ageing through a product. The boring stuff is the real anti-ageing protocol, and it is largely free. Frequently asked. Is slow ageing just good genes? Partly. Genetics contributes and clusters in some long-lived families, but research suggests lifestyle and environment account for the larger share of how we age, so habits matter more than the genes alone. Can I actually slow my own ageing? To a meaningful degree, yes. Regular activity, good sleep, a whole-food diet, managing stress, not smoking, and strong social connection are all associated with slower biological ageing. What is biological age? It is a measure of how worn or well-maintained your body is at the cellular level, which can differ from your calendar age. The slow-ageing person has a biological age behind their chronological one. Do anti-ageing supplements work? Most run far ahead of the evidence. The genuinely proven levers are unglamorous lifestyle habits, not products, so be skeptical of anything promising to reverse ageing through a purchase.

One thing to try

Pick the lifestyle levers that actually move biological ageing and start with the weakest one. Move your body regularly, since physical activity is one of the most powerful slow-ageing signals across multiple body systems. Protect your sleep, because that is when much of the body's repair happens. Build your diet around whole foods, plenty of plants and fibre, less ultra-processed food, sugar, and excess. Manage chronic stress, which is itself associated with faster ageing. Do not smoke, and moderate alcohol, two of the most reliable accelerators. And keep strong social connection and a sense of purpose, consistently linked to healthier, longer life. None of this is a pill, and it is largely free.

Each decode is a research-backed tendency, not a diagnosis. A tap tells you how your body is likely wired and what to try, it does not label you, and nothing here is a substitute for a doctor where a medical question is involved.