Small daily habits can add years to your life, but the most impactful ones focus on sleep, movement, and diet. Dr. Julia Jones, a 54-year-old neuroscientist from Kent, England, says she has added 20.1 years to her life expectancy by implementing 48 different lifestyle changes. Jones calculated this figure using an online assessment tool (vitalityage.co.uk), which provides estimates based on lifestyle inputs rather than clinical measurements. Her motivation came from losing both parents to preventable diseases: her father died of a heart attack at 65, and her mother died of bowel cancer at 77. Now, Jones is sharing the habits she believes have extended her biological age, backed by emerging research on general longevity factors. What Does the Latest Research Say About Adding Years to Your Life? Recent studies suggest that Jones's focus on multiple small changes may be onto something. A 2026 study published in eClinicalMedicine, conducted by researchers at the University of Sydney, followed nearly 60,000 people in the United Kingdom over an average of eight years. The findings were striking: people who combined improvements in just three areas, sleep, physical activity, and diet, saw measurable gains in lifespan. The study found that even modest increases in these three habits could add time to your life. Specifically, adding just five extra minutes of sleep per night, two minutes of moderate to vigorous physical activity like brisk walking or taking the stairs, and an additional half serving of vegetables per day could lead to an extra year of life for people who currently had poor habits in these areas. But the real payoff came for those who made more substantial changes: getting seven to eight hours of sleep per night, doing more than 40 minutes of moderate to vigorous physical activity daily, and eating a healthy diet were associated with over nine years of additional lifespan and years spent in good health, compared to those with the worst sleep, physical activity, and dietary habits. Which Specific Habits Does Dr. Jones Recommend? Jones has distilled her 48 habits into 15 that she considers most accessible for everyday people. Her approach focuses on small, sustainable swaps rather than dramatic overhauls. Here are the key habits she emphasizes: - Morning Sunlight Exposure: Jones steps outside each morning to let sunlight hit the back of her retina, which she says is the best way to regulate her sleep cycle and set her biological clock. - Cold Showers: Taking a cold water burst during your daily shower can trigger endorphins, the so-called "happy hormones," to help improve mood, alertness, and mental clarity. - Swap Milk Chocolate for Dark Chocolate: Dark chocolate contains significantly more cocoa, which is an antioxidant, and less sugar and dairy additives. A study published in December 2025 found that of 1,700 people, those who had more of the substance theobromine, a key component of dark chocolate, in their blood appeared to have a lower biological age. - Daily Flossing: Daily flossing is associated with better cardiovascular health and acts as a preventative measure against heart disease and stroke. One study showed regular flossing was associated with a 22 percent lower risk of ischemic stroke, the most common type. - Swap Crisps for Nuts: Nuts are high in unsaturated fats, fiber, vitamins, and minerals, while crisps are high in saturated fats. Regular nut consumption has been linked with lower blood cholesterol. Walnuts are particularly beneficial; a study published in the American Heart Association's journal found that adults who ate about half a cup of walnuts every day for two years were able to lower their levels of bad cholesterol. - Consistent Sleep Schedule: Having consistent sleep and wake times all week, even on weekends, decreases stress, reduces the risk of chronic disease, and improves nutritional choices the next day. - Intermittent Fasting: Jones uses intermittent fasting, which involves limiting eating to a smaller window than usual, such as 7 a.m. to 9 p.m. This gives the body's cells a chance to do repair work instead of constantly digesting. Important note: intermittent fasting is not appropriate for everyone, particularly those with diabetes or taking glucose-lowering medications. Any fasting protocol should be individualized and medically supervised, especially for people who are pregnant, underweight, or have a history of disordered eating. - Decaf Instead of Regular Coffee: Jones switched from lattes to decaf Americanos. If someone struggles with sleep and drinks a lot of coffee, switching to decaf or cutting down could have a significant impact on sleep quality and overall health. - Take the Stairs: Jones takes the stairs instead of the lift, incorporating more physical activity into her daily routine. How to Start Building Longevity Habits That Stick Jones emphasizes that the key to success is not trying to change everything at once. Instead, she recommends focusing on one habit at a time. Her 90-day habit reset program initially saw 69 percent of people sticking to new habits. She explains her philosophy: "If you change just one habit, you can add years to your life. If you are doing something every day over the course of a lifetime, then it has a very great cumulative effect". Here are practical steps to implement this approach: - Start with One Change: Pick a single habit from the list above that feels most achievable for your lifestyle. This could be adding five minutes of sleep, switching to dark chocolate, or starting to floss daily. - Track Your Progress: Use a simple method to track whether you're doing the habit each day. This could be a calendar, a phone app, or even a checklist on your refrigerator. - Build Gradually: After 90 days, when the first habit feels automatic, add a second habit. This staggered approach prevents overwhelm and increases the likelihood of long-term success. - Focus on Cumulative Effects: Remember that small changes compound over time. A single habit might seem insignificant, but when practiced daily for decades, the impact becomes substantial. Why Does Habit Stacking Matter More Than Perfection? Jones's approach differs from many longevity programs that promise dramatic results from a single intervention. Instead, she argues that the real power comes from combining multiple modest changes. This aligns with the University of Sydney research, which showed that the combination of better sleep, more movement, and improved diet produced the largest gains in lifespan. The reason habit stacking works is partly psychological and partly biological. Psychologically, making one small change at a time is far more sustainable than overhauling your entire lifestyle overnight. Biologically, these habits target different systems in your body: sleep affects stress hormones and immune function, physical activity strengthens your cardiovascular system and muscles, and diet provides the nutrients your cells need to repair and regenerate. Jones notes that some habits have more impact than others. "Obviously, some habits have more impact on your lifespan; kicking smoking is better than switching to decaf coffee. That said, if you are someone who struggles with sleep and drinks a ton of coffee, switching to decaf or cutting down could have a huge impact on your sleep and thereby your health". What's the Realistic Timeline for Adding Years to Your Life? The University of Sydney study provides evidence-based estimates: people who make substantial improvements in sleep, physical activity, and diet can expect to add over nine years to their lifespan and years spent in good health. The key takeaway is that you don't need to be perfect or make drastic changes. Even small improvements in these three areas, such as adding five minutes of sleep, two minutes of activity, and half a serving of vegetables, can add approximately one year of life for people starting from poor baseline habits. Jones is now launching a "Million Extra Years" campaign to encourage others to embed new habits into their daily lives. Her message is simple: the time to start is now, and the best habit to begin with is the one you're most likely to stick with.
