Learn the Science

Growing Older & Heavier

OZC Editorial Team

Older adult with a larger body doing resistance exercise to support strength and healthy aging

Aging brings unique changes to how the body processes energy, builds muscle, and manages fat. For those of us aged 65 and older, losing weight is not simply about cutting calories. It requires a balanced approach that protects our muscle mass and bone density while controlling excess fat to prevent chronic diseases like type 2 diabetes, cardiovascular disease, and hypertension, plus several other chronic diseases.

Prioritize Muscle Mass Over Fast Weight Loss

Rapid weight loss in older adults often leads to muscle loss (sarcopenia) and reduced bone density, which increases the risk of frailty and falls.

  • Focus on Body Composition: Aim to preserve or build lean muscle while losing fat mass.
  • Prioritize Protein Intake: Distribute high-quality protein (such as poultry, fish, eggs, legumes, and dairy) across all daily meals to support muscle synthesis.
  • Incorporate Resistance Training: Combine dietary changes with strength or resistance exercises twice a week to preserve functional strength and metabolic balance.

Shift Focus to Metabolic Health Metrics

A person’s Body Mass Index (BMI) becomes less predictive of overall health in older age. Instead, shift focus toward functional health metrics and metabolic indicators:

  • Waist Circumference: Central adiposity (abdominal fat) carries higher risks for cardiovascular disease and insulin resistance than overall weight.
  • Metabolic Biomarkers: Monitor blood pressure, blood glucose levels, lipid panels, and mobility markers with a primary care provider.

Adopt a Nutrient-Dense, Low-Inflammation Diet

Because calorie needs decrease with age due to lower basal metabolic rates, every meal should deliver maximum nutrition.

Nutritional Focus Recommended Approach
Fiber & Micronutrients Emphasize vegetables, whole grains, and berries to improve digestion and combat chronic inflammation.
Hydration Drink water regularly; the sensation of thirst often diminishes with age, leading to unintentional dehydration.
Quality Fats Swap saturated fats for monounsaturated and polyunsaturated fats found in olive oil, nuts, and salmon.