You may have heard the saying, “It’s not just about adding years to your life, but life to your years.” This is the essence of healthspan—the period of your life spent in good health, free from chronic disease and disability. While lifespan tells us how long we live, healthspan measures how well we live.
With advances in medicine, it’s now possible to extend healthspan significantly through personalised nutrition, functional medicine, and lifestyle interventions.
This article explores some of the science behind healthspan and practical steps you can take to optimise it.
What Exactly Is Healthspan?
Healthspan is defined as the length of time you remain healthy and fully functional before the onset of age-related diseases or disabilities. Key markers of healthspan include:- Metabolic health: healthy insulin sensitivity, stable blood glucose.
- Cardiovascular health: optimal blood pressure, low inflammation, good circulation.
- Muscle and bone strength: preserving lean mass and mobility.
- Cognitive function: memory, attention, executive function.
Why Healthspan Matters
In New Zealand and globally, chronic diseases now account for >70% of all deaths and a large proportion of healthcare costs.- Heart disease and diabetes are rising due to poor diet and inactivity.
- Cancer risk increases as we age.
- Cognitive decline can begin decades before symptoms appear.
The Biology of Ageing: What Drives Decline?
There are several interconnected processes that underlie biological ageing:- Mitochondrial dysfunction – our cellular energy factories become less efficient.
- Chronic low-grade inflammation (“inflamm-ageing”).
- DNA damage accumulation and epigenetic changes.
- Loss of metabolic flexibility (inability to switch between fuel sources).
- Hormonal decline, including DHEA, oestrogen, testosterone, and melatonin.
Five Evidence-Based Strategies to Optimise Healthspan
Let’s explore practical, research-backed approaches you can start today: 1. Optimise Metabolic Flexibility- Adopt a diet rich in whole foods, plants, and omega-3 fats.
- Limit refined carbohydrates and sugar.
- Consider time-restricted eating (e.g., 14-hour overnight fast).
- Strength training at least 2–3 times weekly maintains lean mass and bone density.
- Target protein intake: 1.2–1.6g/kg body weight daily.
- Consider creatine monohydrate to support strength and muscle preservation.
- Key nutrients: CoQ10, magnesium, alpha-lipoic acid.
- Moderate aerobic exercise improves mitochondrial biogenesis.
- Avoid chronic stress and toxins that damage mitochondria.
- Emphasise colourful vegetables and polyphenols (berries, herbs, olive oil).
- Supplement with omega-3 EPA/DHA if needed.
- Regular movement reduces inflammatory cytokines.
- Aim for 7–9 hours of restorative sleep.
- Reduce screen exposure before bed.
- Align eating and light exposure to the day-night cycle.
Tracking Your Progress
Consider annual or semi-annual monitoring of key biomarkers:- Fasting insulin & HbA1c: metabolic health.
- hs-CRP & homocysteine: inflammation and cardiovascular risk.
- Vitamin D: immune and bone health.
- CTC (Circulating Tumour Cells): cancer surveillance.
- Body composition: lean mass vs fat mass.