Living longer is one thing. Living stronger, healthier, and more independently is what truly matters.
Imagine yourself at 70. Are you traveling, hiking, playing with your grandchildren, and carrying your own luggage? Can you climb a flight of stairs with ease and do the things you love without limits?
We can’t control every part of aging, but we have more influence over our future health than most of us realize. The choices you make in your 40s help shape how you feel and function in your 50s, 60s, 70s, and beyond.
That’s the difference between lifespan, how long we live, and healthspan, how many of those years we spend feeling healthy, capable, and independent. The goal isn’t simply to add years to your life. It’s to add life to those years, and the best time to start investing in that future is now.
Healthy aging at a glance:
- Eat mostly whole, nutrient-dense food, with protein at every meal.
- Fill nutritional gaps with omega-3s, magnesium, vitamin D, and bioactive B vitamins when appropriate.
- Strength train at least two days a week and get 150 minutes of cardio.
- Know your numbers: blood pressure, cholesterol, blood sugar, and age-appropriate screenings.
- Protect your sleep, recovery, and stress levels.
1. Eat for the Health You Want 20 Years From Now
Food is one of the most powerful tools we have for long-term health. What you eat influences blood sugar regulation, cardiovascular health, muscle maintenance, and many of the biological processes involved in aging.
Rather than chasing restrictive diets or the latest nutrition trend, keep the foundation simple: eat real, high-quality, nutrient-dense food most of the time. Build your meals around three nutritional foundations.
Phytochemical-Rich Foods
Colorful fruits and vegetables contain naturally occurring plant compounds called phytochemicals, including polyphenols, flavonoids, and carotenoids. These compounds help support cellular health and the body’s antioxidant defenses, and many are associated with a healthier inflammatory response and cardiovascular health.
Think blueberries, leafy greens, broccoli, tomatoes, beets, colorful peppers, herbs, and spices. The more color and variety on your plate, the wider the range of beneficial plant compounds you’re likely to get.
Healthy Fats
Healthy fats are essential for normal cell function and help support heart and brain health. Favor unsaturated fats over excess saturated fat, and make these foods part of your daily routine:
- Extra-virgin olive oil
- Avocados
- Raw or sprouted walnuts, almonds, and other nuts
- Chia, flax, and pumpkin seeds
- Omega-3-rich fish such as salmon and sardines
High-Quality Protein
Protein becomes more important as we age because it supplies the building blocks your body needs to repair and maintain muscle. Include eggs, fish, poultry, lean meats, Greek yogurt, cottage cheese, tofu, and legumes, and make protein a priority throughout the day rather than an afterthought at dinner. For more on how much you need, read The Protein Puzzle.
Embrace the 80/20 Rule
Healthy eating doesn’t mean never having pizza, dessert, or your favorite restaurant meal. A realistic approach is the 80/20 rule: aim for about 80% of your food to come from whole or minimally processed, nutrient-dense foods, and allow 20% flexibility for the foods you simply enjoy.
Limit the foods that can contribute to poorer metabolic health when eaten often, including sugary drinks, processed meats, heavily refined snacks, and deep-fried foods. A diet rich in plants, fiber, quality protein, and healthy fats can also support a healthier inflammatory balance (see Are Your Everyday Foods Secretly Fueling Hidden Inflammation?).
Rather than labeling every food good or bad, look at your overall pattern. When you consistently nourish your body, there’s room to enjoy life’s celebrations without guilt. Healthy aging isn’t built on perfection. It’s built on consistency.
2. Supplement Strategically to Fill Nutritional Gaps
Whole foods should always be the foundation, but certain nutrients deserve extra attention as we age, and supplements can help bridge the gap when diet alone isn’t enough. Here are four worth considering. Quality matters, so read why choosing high-quality supplements matters before you buy.
Omega-3 Fatty Acids for Heart, Brain, and Cellular Health
Omega-3 fatty acids, particularly EPA and DHA, support cardiovascular health, brain function, and normal inflammatory processes. Fatty fish such as salmon and sardines are excellent sources.
Some individualized wellness protocols target 2,000 mg (2 grams) of combined EPA and DHA daily, although this isn’t a universal recommendation. Reaching that amount from food alone would take roughly 3.5 to 6 ounces of certain fatty fish every day. For many people that isn’t realistic, which makes a high-quality omega-3 supplement a convenient option when extra EPA and DHA are appropriate.
Become a label reader. A supplement labeled “1,000 mg Fish Oil” may contain only 180 mg EPA and 120 mg DHA, just 300 mg of combined EPA and DHA. The rest of the oil isn’t necessarily filler, but it doesn’t count toward your EPA/DHA intake. Look for clearly labeled EPA and DHA amounts and independent purity testing.
Our Wellness Team can help you choose the right formula and amount for your goals. Discuss higher-dose omega-3s with your healthcare provider, especially if you have a cardiovascular condition or take medications that affect bleeding.
Magnesium for Muscle, Metabolic, and Nervous System Health
Magnesium supports hundreds of essential processes, including muscle function, energy production, blood sugar regulation, and bone health. Many adults get less than the recommended amount. Low magnesium can cause fatigue, muscle weakness, cramps, or spasms, and low magnesium status has been associated with high blood pressure, type 2 diabetes, osteoporosis, and migraines, although it isn’t necessarily the cause.
Prioritize magnesium-rich foods such as leafy greens, pumpkin seeds, nuts, and legumes. When you need a supplement, Peoples Rx favors two forms, depending on your goals:
- Magnesium glycinate: a well-tolerated, stomach-friendly form that supports muscle relaxation, nervous system function, and restful sleep. A great choice for relaxation and recovery.
- Magnesium L-threonate: a specialized form that crosses the blood-brain barrier and is studied for brain health. Emerging research suggests benefits for memory, cognitive performance, and certain aspects of sleep, making it appealing if you’re focused on cognitive health as you age.
Not sure which is right for you? See Which Magnesium Is Right for You? or ask our Wellness Team.
Vitamin D for Bone, Muscle, and Immune Health
Vitamin D plays a vital role in calcium absorption, bone strength, muscle function, immune health, and overall cellular health. Yet keeping healthy levels isn’t always as simple as getting more sun.
Aging, limited sun exposure, darker skin, higher body fat, and low dietary intake can all contribute to low vitamin D. Digestive conditions such as celiac or Crohn’s disease can interfere with absorption, and certain medications and liver or kidney conditions can affect how the body processes it. Identifying the root cause matters most when levels stay low despite supplementation.
At Peoples Rx, we take a proactive approach that looks beyond simply avoiding deficiency. Conventional guidelines consider 20 ng/mL adequate for most adults; we encourage discussing a target of 50 to 70 ng/mL, a range favored by some integrative practitioners as part of an optimal wellness strategy. Because the benefits and safety of this higher range aren’t established for everyone, individualized testing, supplementation, and monitoring are important.
Struggling to raise your vitamin D? Two things to check:
- Your magnesium intake. Magnesium helps the body convert vitamin D into its usable forms, so low magnesium may hold your levels back.
- The form you take. Micellized vitamin D3 is processed into tiny, water-dispersible particles called micelles that mix with digestive fluids and may improve absorption. NuMedica Micellized D3™ 1200 is designed for better solubility and bioavailability than traditional oil-based formulas, although superior absorption hasn’t been established for everyone.
B Vitamins in Their Bioactive Forms for Brain Health, Mood, and Energy
B vitamins are essential for energy production, nervous system health, and making the neurotransmitters that influence mood, sleep, motivation, and focus.
Vitamin B6, especially its active form P5P (pyridoxal 5′-phosphate), helps produce serotonin, dopamine, and GABA. It’s involved in more than 100 enzymatic reactions: metabolizing protein, producing energy, supporting immune function, forming hemoglobin to carry oxygen, and supporting healthy homocysteine metabolism, an important part of cardiovascular health.
Folate (B9) and vitamin B12 work together to support methylation, a process involved in DNA synthesis, cellular repair, nervous system health, and neurotransmitter metabolism. Folate supports the pathways that produce serotonin and dopamine, while B12 helps maintain healthy nerves and their protective covering. Together they support red blood cell formation and homocysteine metabolism. Low levels can contribute to fatigue, trouble concentrating, mood changes, and neurological symptoms.
Genetic variations, particularly in the MTHFR gene, can make it harder to convert folate into its active form, methylfolate (5-MTHF). That’s why Peoples Rx favors bioactive forms, including P5P (B6), methylfolate (B9), and methylcobalamin (B12), tailored to individual needs. Standard labs don’t always tell the full story, either; learn why in Your B12 and Folic Acid Labs May Be Misleading You.
Peoples Rx Top Pick: CellCore Methyl B Complex provides B6 as P5P, methylfolate, and methylcobalamin along with other essential B vitamins to support healthy methylation, cellular energy, nervous system function, and cardiovascular health.
The takeaway: the form of your B vitamins matters. Read your labels, choose quality formulations, and keep highly processed foods to a minimum so whole foods can supply B vitamins naturally.
3. Muscle May Be Your Greatest Longevity Asset
When most people think about aging, they focus on heart health, cholesterol, or weight. But another part of the conversation deserves much more attention: muscle.
Dr. Gabrielle Lyon, known for her work in Muscle-Centric Medicine®, emphasizes skeletal muscle as a foundation for metabolic health, physical resilience, and healthy aging. Muscle does far more than help us look fit. It plays a critical role in:
- Blood sugar regulation: skeletal muscle is a major site of glucose uptake and supports insulin sensitivity.
- Metabolic health: maintaining muscle supports a healthy metabolism and body composition.
- Bone and joint health: strong muscles support the skeleton and improve physical function.
- Balance and mobility: strength lets us move confidently through everyday life.
- Independence: preserving muscle helps us keep lifting, climbing, carrying, and staying active as we age.
Without regular resistance exercise, muscle strength and mass generally decline with age, and the loss can speed up later in life. But that path isn’t inevitable. Resistance training can help preserve and build muscle at any age. (Read more in What Happens to Muscle After 40 and How to Fight Back.)
Don’t Wait Until You’re Losing Strength to Build It
Think about what you want to do at 70: hike on vacation, carry your own luggage, get up off the floor without help, or simply keep up with your family. All of it takes strength, endurance, and mobility, and the muscle you build in your 40s creates the physical reserve you’ll rely on later.
You don’t need to become a bodybuilder. To get started:
- Strength train at least two days per week, working all major muscle groups. Three well-structured sessions may be appropriate as your fitness improves.
- Focus on functional movements: squats, hinges, presses, rows, carries, and step-ups.
- Gradually increase resistance as your body adapts so your muscles keep being challenged.
- Pair your training with enough protein to support recovery and muscle growth.
The goal isn’t just more muscle today. It’s the strength and physical capacity to enjoy life for decades to come.
4. Train for the Life You Want to Live
Dr. Peter Attia, author of Outlive, encourages people to think about exercise in terms of the activities they want to stay capable of later in life. Instead of exercising only to lose weight or change your appearance, train to keep your capabilities for decades. A well-rounded routine includes four components.
Strength Training
Prioritize resistance exercise to build and preserve muscle, support bone health, and improve functional strength.
Cardiovascular Fitness
Your heart and lungs need regular training too. Brisk walking, cycling, swimming, hiking, and jogging all count. Aim for at least 150 minutes of moderate-intensity aerobic activity per week, or an equivalent amount of vigorous activity.
Higher-Intensity Exercise
As your fitness and health allow, challenging intervals can improve aerobic capacity, including VO₂ max, a measure of how well your body uses oxygen during intense exercise. Cardiorespiratory fitness is strongly associated with long-term health outcomes.
Mobility and Balance
Flexibility, stability, and balance become increasingly important for reducing fall risk, maintaining confidence, and moving independently.
The objective isn’t to be the strongest or fastest person in the gym. It’s to build a body that can do the things you love for as long as possible.
5. Know Your Numbers Before Problems Develop
One of the biggest opportunities in preventive health is catching risk factors before they become major problems. High blood pressure, elevated cholesterol, and insulin resistance can develop without obvious symptoms, so feeling healthy doesn’t always tell the whole story.
By your 40s, it’s important to have a relationship with a healthcare provider and understand your personal risk factors. Essential screenings and assessments include:
- Blood pressure: catch elevated readings and address cardiovascular risk early.
- Cholesterol and lipid panel: LDL, HDL, triglycerides, and overall cardiovascular risk. (Why might yours be high? It’s not always because it runs in the family.)
- Blood sugar: a fasting glucose or hemoglobin A1c can help detect prediabetes or diabetes when screening is appropriate.
- Age-appropriate cancer screenings: discuss mammograms beginning at 40, colorectal cancer screening beginning at 45 for average-risk adults, and other screenings based on your history.
- Targeted nutritional and health testing: blood counts, metabolic panels, thyroid function, iron, vitamin B12, or vitamin D may be appropriate depending on your symptoms, medications, and risk factors.
These evaluations establish an important baseline. If you want a more proactive approach to healthy aging, the conversation doesn’t have to end there.
6. Beyond Routine Labs: Proactive Longevity Testing
Modern preventive medicine offers additional tools to better understand cardiovascular risk, metabolic health, and physical fitness. Not every test is right for everyone, but the right ones, selected and interpreted by a qualified healthcare professional, can provide meaningful information.
Advanced Cardiovascular Testing
- Apolipoprotein B (ApoB): measures a protein found on potentially artery-clogging lipoprotein particles, adding cardiovascular risk information for selected individuals.
- Lipoprotein(a), or Lp(a): a largely inherited risk factor not included in standard cholesterol testing. Current guidelines recommend measuring it at least once in adulthood.
- High-sensitivity C-reactive protein (hs-CRP): a marker of inflammation that may add cardiovascular risk information in certain circumstances.
- Coronary artery calcium (CAC) scan: an imaging test that assesses calcified plaque in the coronary arteries and can refine cardiovascular risk when appropriate.
Metabolic Health: Look Beyond Blood Sugar
Insulin resistance can begin developing years before a diagnosis of prediabetes or type 2 diabetes. At Peoples Rx, we believe in identifying early signs of metabolic dysfunction rather than waiting for blood sugar to rise. (For the basics, see our guide to blood sugar regulation.)
- Fasting insulin and glucose: measuring fasting insulin alongside glucose shows how hard your body is working to keep blood sugar steady. Elevated fasting insulin may be an early sign of insulin resistance even when glucose and A1c look normal. Some integrative practitioners use these results to calculate HOMA-IR, an estimate of insulin resistance.
- Continuous glucose monitoring (CGM): why guess how your body responds to food when you can see your glucose patterns in real time? A CGM shows how meals, exercise, sleep, and daily habits affect your blood sugar, which can guide smarter choices. Long-term benefits for people without diabetes are still being studied.
Body Composition and Physical Fitness
- InBody or DXA body composition analysis: tracks muscle mass and body fat beyond what the scale shows. You can get an InBody scan at Peoples Rx.
- VO₂ max testing: insight into cardiovascular fitness and aerobic capacity.
- Functional strength assessments: grip strength, walking performance, and other movement-based measures track physical function over time.
These assessments aren’t all recommended as routine screenings, and more testing isn’t automatically better. The real value isn’t collecting numbers. It’s finding meaningful opportunities to improve your health and tracking the changes that matter. Explore the at-home testing kits available at Peoples Rx to discuss with your provider.
7. Don’t Overlook Sleep, Recovery, and Stress
Nutrition and exercise are essential, but they can’t do the work alone. Sleep and recovery influence energy, metabolic regulation, cognitive performance, and your ability to adapt to exercise.
- Aim for at least seven hours of sleep a night on a consistent schedule. (Poor sleep affects more than energy; see what happens to your heart when you don’t sleep well.)
- Make time for things that ease chronic stress: time outdoors, meaningful relationships, mindfulness, or a favorite hobby.
- Remember that recovery is part of progress. A stronger body needs time to adapt.
Healthy aging is about balance: challenging your body, nourishing it, and letting it recover.
8. Your Health Through the Decades: What to Focus on as You Age
Healthy aging doesn’t mean changing everything on a particular birthday. It’s about building a strong foundation and adjusting as your body and needs evolve. Everyone’s journey is different, but certain areas deserve more attention at each stage of life.
Your 50s: Protect Your Muscle and Metabolic Health
Your 50s are a key time to prioritize muscle preservation, metabolic health, and hormonal changes. For women, the menopause transition can change body composition, sleep, and bone health (see Your Menopause Symptoms Are Not Normal). Men may experience gradual changes in hormones, muscle mass, and metabolism too (see Andropause: Men’s Menopause).
Your focus: keep building muscle with progressive strength training, prioritize protein-rich meals, monitor cardiovascular and metabolic risk factors, and pay attention to bone health. The strength and metabolic resilience you built in your 40s pays off here.
Your 60s: Invest in Heart, Brain, and Bone Health
Regular exercise supports circulation, brain health, balance, and mobility, and keeping blood pressure, cholesterol, and blood sugar in a healthy range matters more as risks accumulate with age. It’s also time to reassess bone health and fracture risk. Routine osteoporosis screening is recommended for women beginning at 65, with earlier testing for some people at increased risk. (Learn more in Ask the ND: Osteoporosis.)
Your focus: maintain strength and cardiovascular fitness, add balance training, stay socially and mentally engaged, and keep up with preventive screenings. The goal isn’t to slow down because you’re getting older. It’s to stay capable of enjoying everything life has to offer.
Your 70s and Beyond: Preserve Independence and Keep Living Fully
Imagine being 75 and still able to hike, travel, lift your grandchildren, work in the garden, or carry your groceries without help. Maintaining muscle strength, balance, cardiovascular endurance, and good nutrition helps support that independence and reduces the risk of falls and physical limitations. And it’s never too late: older adults can keep improving strength and physical function with appropriate exercise.
Your focus: keep moving, keep challenging your muscles, eat enough high-quality protein, and prioritize the activities that keep you independent and engaged. The ultimate goal isn’t just reaching your 70s. It’s arriving there with the strength, energy, and freedom to live life on your terms.
9. Make Your Health a Lifelong Investment
It’s easy to put preventive health off. We’ll start exercising when work slows down, eat better after the holidays, and schedule that checkup when life is less busy. But the years move quickly.
What if we treated our health like financial planning? We don’t wait until retirement to start saving for it. We invest along the way, knowing those choices pay off decades later. Every nutritious meal, strength session, walk, and appropriate screening is an investment in your future self.
You don’t need to overhaul your life overnight. Start with a few meaningful commitments:
- Build your meals around whole, nutrient-dense foods.
- Make protein and muscle preservation a priority.
- Do strength training and regular cardiovascular exercise.
- Fill nutritional gaps with thoughtful supplementation when appropriate.
- Understand your personal health risks and discuss appropriate testing.
- Prioritize sleep, recovery, and consistency.
Whether you’re 40, 50, 60, or beyond, it’s never too late to start investing in your health.
Frequently Asked Questions About Healthy Aging
What is the difference between lifespan and healthspan?
Lifespan is how long you live. Healthspan is how many of those years you spend healthy, capable, and independent. Healthy aging focuses on extending healthspan so your later years are active ones.
Why do your 40s matter so much for healthy aging?
Muscle mass, metabolic health, and cardiovascular risk factors begin to shift in midlife, often without symptoms. Building strength, eating well, and knowing your numbers in your 40s creates the physical and metabolic reserve you’ll rely on in your 60s and 70s.
How often should I strength train after 40?
Aim for at least two strength-training sessions per week that work all major muscle groups, increasing resistance gradually. Three sessions may be appropriate as your fitness improves. Pair training with 150 minutes of moderate cardio a week.
Which supplements are most useful for healthy aging?
Omega-3s (EPA and DHA), magnesium, vitamin D, and B vitamins in bioactive forms are four worth discussing with your provider. Supplements should fill gaps in a whole-food diet, not replace it, and the right choice depends on your labs, medications, and goals.
What lab tests should I ask about in my 40s?
Start with blood pressure, a lipid panel, fasting glucose or A1c, and age-appropriate cancer screenings. For a more proactive picture, ask your provider whether ApoB, Lp(a), hs-CRP, fasting insulin, or body composition testing makes sense for you.
Let’s Build a Healthier Future Together
At Peoples Rx, wellness is about more than today’s concerns. It’s about helping you build a foundation for long-term vitality, strength, and quality of life. Our Wellness Team can help you explore personalized nutrition strategies, appropriate supplementation, body composition scans, and testing options to discuss with your healthcare provider. Stop by any of our four Austin locations to get started.
Whether you’re just beginning your wellness journey or ready to take a more proactive approach to healthy aging, we’re here to help you make informed choices. Because the goal isn’t simply to live longer. It’s to live better, stronger, and healthier in the years ahead.
This article is for educational purposes and is not a substitute for individualized medical advice. Screening, testing, and supplement decisions should be made with a qualified healthcare professional.
Resources:
CDC: Physical Activity Guidelines for Adults
U.S. Preventive Services Task Force: A and B Recommendations
NIH Office of Dietary Supplements: Omega-3 Fatty Acids
NIH Office of Dietary Supplements: Magnesium
NIH Office of Dietary Supplements: Vitamin D
American Heart Association: Life’s Essential 8
If you have comments or questions about this blog, email us at blog@peoplesrx.com.