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Revealing youthful secrets: Dr Ian K Smith (Triste Smith\/PA)<\/p>\nWe all know ageing is inevitable \u2013 but that doesn\u2019t stop most of us wanting to look and feeling younger.<\/p>\n
But while there\u2019s no mythical fountain of youth to bathe in, there are ways to slow down how ageing makes us look and feel, promises Dr Ian K Smith.<\/p>\n
In the Harvard-educated doctor\u2019s new book, Eat Your Age, he says: \u201cThere\u2019s so much you can do to keep yourself looking and feeling youthful, and it doesn\u2019t depend on how much money you have or how many times you visit the plastic surgeon.<\/p>\n
\u201cIt\u2019s about how well you plan, how aware you are of your body and health, and the simple steps you can take to forge a path of vigour and vitality that has nothing to do with the number of candles on your birthday cake.\u201d<\/p>\n
Smith says his book is built on the idea that the body\u2019s nutritional, metabolic and medical needs evolve with age, and our eating habits need to evolve with them. But rather than offering a one-size-fits-all diet, he explains how to align food choices, physical activity, and preventive care with the specific demands of each decade of life.<\/p>\n
\u201cThe goal is to help slow metabolic decline, preserve muscle, reduce chronic disease risk, and extend health span \u2013 not just lifespan,\u201d he says. \u201cUltimately, it empowers people to take control of ageing through practical, science-based strategies that make longevity an intentional, achievable process.\u201d<\/p>\n
Revealing youthful secrets: Dr Ian K Smith (Triste Smith\/PA)<\/p>\n
Here, Smith outlines what dietary, movement and health measures people need to take in specific decades of life to help them look and feel younger\u2026<\/p>\n
Your 30s: Choices that shape future health<\/p>\n
The choices you make in your 30s quietly begin to shape how you age, says Smith. \u201cWhile the body is still resilient, early metabolic shifts are already underway, making prevention far more powerful than correction,\u201d he explains.<\/p>\n
\u201cThis is the time to build strong nutritional habits, consistent movement patterns, and medical awareness that will pay dividends for decades to come.\u201d<\/p>\n
Eating for prevention<\/p>\n
Smith advises people in their 30s to shift from \u2018calories only\u2019 thinking to nutrient density, prioritising lean protein at every meal, fibre-rich vegetables, and healthy fats, while minimising ultra-processed foods.<\/p>\n
\u201cThis decade is about preventing insulin resistance before it starts,\u201d he says. Your metabolism is still relatively resilient, but subtle changes are occurring. Blood sugar regulation, cholesterol patterns and inflammatory markers can begin drifting in the wrong direction without obvious symptoms.<\/p>\n
\u201cThis is why there should be an emphasis on eating for prevention, not correction,\u201d he says. \u201cBalanced meals that combine protein, fibre and healthy fats slow digestion, reduce blood sugar spikes, and support sustained energy throughout the day.\u201d<\/p>\n
And he warns that while skipping meals or relying heavily on refined carbohydrates may not cause immediate weight gain, it sets the stage for metabolic dysfunction later.<\/p>\n
Set consistent exercise goals<\/p>\n
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(Alamy\/PA)<\/p>\n
Establish a consistent resistance-training routine (at least two to three days per week). \u201cMuscle mass gained in your 30s becomes metabolic insurance later in life,\u201d Smith explains. \u201cStrength training improves insulin sensitivity, protects joints, and raises resting metabolic rate.\u201d<\/p>\n
Strength training should be paired with moderate cardiovascular activity \u2013 brisk walking, cycling, or swimming \u2013 to support heart health without excessive stress, he says.<\/p>\n
Medical screening<\/p>\n
Get baseline lab tests: fasting glucose, lipid panel, blood pressure, plus waist circumference. \u201cThese markers create a personal health starting line and help identify silent risks early,\u201d he explains.<\/p>\n
Your 40s: Strategic maintenance and metabolic protection<\/p>\n
The 40s mark a transition from building health to actively protecting it, says Smith. Hormonal changes and a gradual metabolic slowdown mean the body no longer responds the way it once did, even when habits remain unchanged. \u201cThis decade calls for smarter nutrition, more intentional exercise, and proactive screening to stay ahead of silent risks,\u201d he says.<\/p>\n
Nutrition to support hormonal shifts<\/p>\n
As metabolic rate begins to slow, protein becomes essential for preserving lean mass and managing appetite. Hormonal shifts, particularly in estrogen, testosterone, and cortisol, start to influence how the body stores fat and responds to stress. \u201cIt\u2019s important to spread protein evenly across meals rather than concentrating it at dinner,\u201d stresses Smith. \u201cThis supports muscle repair, stabilises blood sugar, and reduces late-night overeating.\u201d<\/p>\n
In addition, paying attention to portion sizes and reducing liquid calories becomes increasingly important, as caloric needs decline even when hunger doesn\u2019t.<\/p>\n
Maintain cardiovascular fitness<\/p>\n
Incorporate higher-intensity workouts alongside strength training, Smith advises. Short bursts of interval training help maintain cardiovascular fitness and counter age-related metabolic slowdown.<\/p>\n
\u201cRecovery matters more now,\u201d he says. \u201cAdequate sleep, mobility work, and rest days are essential to avoid burnout and injury.\u201d<\/p>\n
Medical screening<\/p>\n
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(Alamy\/PA)<\/p>\n
Begin routine bowel cancer screening discussions, and regular blood pressure, cholesterol and diabetes monitoring \u2013 especially if there\u2019s family history.<\/p>\n
Your 50s: Preserving strength, reducing inflammation<\/p>\n
In your 50s, health becomes less about weight and more about resilience, Smith says. \u201cMuscle loss, inflammation and chronic disease risk accelerate unless directly addressed through diet and movement.<\/p>\n
\u201cThe goal of this decade is to preserve strength, protect joints and bones, and maintain metabolic stability,\u201d he explains.<\/p>\n
Focus on good fats, eat the rainbow<\/p>\n
Adopt a more anti-inflammatory eating pattern emphasising omega-3 fats, colourful vegetables, whole grains and reduced added sugars, advises Smith. Digestive efficiency and insulin sensitivity often decline in the 50s, making food quality more important than quantity.<\/p>\n
\u201cInflammation \u2013 not ageing itself \u2013 is a major driver of chronic disease,\u201d he warns.<\/p>\n
Foods rich in antioxidants help protect blood vessels, joints and the brain. Adequate protein remains critical, but so does hydration, as thirst signals weaken with age. Mindful eating and slower meal pacing also improve digestion and nutrient absorption, he points out.<\/p>\n
Mobility work and strength training<\/p>\n
Make strength training non-negotiable, while adding balance, mobility work, and exercises that challenge stability, such as single-leg movements. \u201cMuscle loss accelerates during this decade if not actively resisted,\u201d he warns.<\/p>\n
Medical screening<\/p>\n
Schedule bone density testing, and have screenings for cardiovascular disease, diabetes and cancer. \u201cEarly detection dramatically improves outcomes,\u201d he stresses.<\/p>\n
Your 60s and beyond: Sustaining independence and quality of life<\/p>\n
The focus in your 60s and beyond shifts from optimisation to preservation and targeted growth, says Smith. \u201cDaily habits now determine mobility, cognitive health and independence more than numbers on a scale.<\/p>\n
\u201cEating well, moving consistently, and staying medically vigilant become the foundation for a longer, more vibrant life.\u201d<\/p>\n
Specific nutrient needs<\/p>\n
Smith recommends focusing on adequate protein, calcium, vitamin D and hydration, while moderating total calories.<\/p>\n
\u201cAppetite may decline, but nutrient needs remain high,\u201d he says, pointing out that under-eating protein is a common and dangerous mistake in older adults. \u201cProtein supports muscle strength, immune function, and recovery from illness. Meals should be simple, nutrient-dense, and easy to digest,\u201d he explains.<\/p>\n
Stay mobile to reduce risk of falls<\/p>\n
Prioritise functional movement \u2013 strength, balance, flexibility, and walking. \u201cThe goal isn\u2019t intensity, but consistency and safety,\u201d says Smith. \u201cRegular movement preserves mobility, reduces fall risk and supports brain health. Even short daily sessions make a meaningful difference.\u201d<\/p>\n
Medical screening<\/p>\n
Maintain consistent vision, hearing, cognitive, cardiovascular, and medication reviews. \u201cThese screenings protect quality of life and help preserve independence well into later years,\u201d says Smith.<\/p>\n
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Eat Your Age (HQ\/PA)<\/p>\n
Eat Your Age by Dr Ian K Smith is published by HQ. Available now.<\/p>\n","protected":false},"excerpt":{"rendered":"We all know ageing is inevitable \u2013 but that doesn\u2019t stop most of us wanting to look and…\n","protected":false},"author":2,"featured_media":248730,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[103,61,60,446],"class_list":{"0":"post-248729","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-nutrition","8":"tag-health","9":"tag-ie","10":"tag-ireland","11":"tag-nutrition"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/248729","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=248729"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/248729\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/248730"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=248729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=248729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=248729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}