Metabolic Age and GLP-1s

Metabolic age is a term that is gaining popularity in health and fitness circles.

It provides an estimate of your metabolic health compared to your actual chronological age.

Understanding metabolic age can offer insights into your overall health, fitness level, and how efficiently your body burns calories.

Definition

Metabolic age is a comparison of your Basal Metabolic Rate (BMR) to the average BMR of people in your age group. BMR is the number of calories your body needs to perform basic physiological functions at rest, such as breathing, circulation, and cell production.

Significance

A lower metabolic age indicates that your body is functioning at a higher metabolic efficiency than the average for your age group. Conversely, a higher metabolic age suggests that your metabolic rate is slower than the average for your age group.

Components of metabolic age

Metabolic age takes into account various factors, including muscle mass, body fat percentage, activity level, and overall health. These factors influence your BMR and your metabolic age.

Basal Metabolic Rate (BMR)

BMR is calculated using equations that consider your age, gender, weight, and height. Common equations include the Harris-Benedict Equation and the Mifflin-St Jeor Equation.

Body composition analysis

Advanced body composition analysers, such as bioelectrical impedance devices, measure parameters like muscle mass, body fat percentage, and water content. These devices use the data to estimate your BMR more accurately.

Comparison with averages

Once your BMR is determined, it is compared to the average BMR values for people in your age group. This comparison helps to estimate your metabolic age.

Example calculation

If a 40-year-old woman has a BMR similar to the average BMR of a 30-year-old, her metabolic age would be estimated at 30 years.

1. Muscle mass. Muscle tissue is more metabolically active than fat tissue. Higher muscle mass increases your BMR, leading to a lower metabolic age.
2. Body fat percentage. Higher body fat percentage can slow down your metabolism, resulting in a higher metabolic age. Reducing body fat through a healthy diet, regular exercise and weight loss medications like Mounjaro can improve your metabolic age.
3. Physical activity level. Regular physical activity boosts your metabolism by increasing muscle mass and promoting efficient energy use. Sedentary lifestyles contribute to a slower metabolism and higher metabolic age.
4. Nutrition. A balanced diet rich in whole foods, lean proteins, healthy fats, and complex carbohydrates supports metabolic health. Nutrient deficiencies and poor dietary habits can negatively impact your metabolism.
5. Hormonal balance. Hormones such as thyroid hormones, insulin, and cortisol play significant roles in regulating your metabolism. Imbalances can lead to metabolic issues and a higher metabolic age.
6. Genetics. Your genetic makeup can influence your metabolic rate and predisposition to certain metabolic conditions.
7. Sleep and stress. Quality sleep and effective stress management are crucial for maintaining a healthy metabolism. Poor sleep and chronic stress can disrupt metabolic processes and increase your metabolic age.

Overall health

A lower metabolic age is associated with better overall health, higher energy levels, and improved physical performance. It indicates that your body is efficiently using energy and maintaining optimal physiological functions.

Weight management

Efficient metabolism aids in weight management by burning calories more effectively. People with a lower metabolic age find it easier to maintain a healthy weight.

Chronic disease risk

A higher metabolic age can be a warning sign of health issues. It may indicate an increased risk of metabolic syndrome, diabetes, cardiovascular disease, and other chronic conditions.

Ageing process

Improving your metabolic age can contribute to healthier ageing by preserving your muscle mass, bone density, and cognitive function.

Increase physical activity

• Cardiovascular exercise. Engage in regular cardiovascular exercises such as running, cycling, or swimming to boost calorie burn and improve your cardiovascular health.
• Strength training. Incorporate strength training exercises to build and maintain muscle mass. Aim for at least two strength training sessions per week. Higher muscle mass leads to a higher resting BMR.
• High-Intensity Interval Training (HIIT). HIIT workouts can significantly increase your metabolism and burn more calories in a shorter amount of time.

Improve your nutrition

• Balanced diet. Eat a diet rich in whole foods, including lean proteins, healthy fats, and complex carbohydrates. Avoid processed foods, excessive sugars, and unhealthy fats.
• Protein intake. Ensure adequate protein intake to support muscle growth and repair. Include sources like chicken, fish, beans, and legumes.
• Hydration. Stay hydrated by drinking plenty of water throughout the day. Proper hydration supports metabolic processes and your overall health.

Manage your stress

• Stress-reduction techniques. Practice stress-reducing activities such as yoga, meditation, deep breathing exercises, and spending time in nature.
• Adequate sleep. Prioritise quality sleep by maintaining a regular sleep schedule and creating a relaxing bedtime routine. Aim for 7-9 hours of sleep per night.

Monitor hormonal health

• Regular check-ups. Schedule regular health check-ups to monitor and address any hormonal imbalances. Thyroid function tests can provide insights into your metabolic health.
• Balanced lifestyle. Maintain a balanced lifestyle with regular exercise, healthy eating, and stress management to support your hormonal balance.

Maintain a healthy weight

• Weight management. Aim for a healthy weight through a combination of balanced nutrition and regular physical activity. Avoid crash diets and focus on sustainable lifestyle changes.
• Body composition. Focus on improving body composition by increasing muscle mass and reducing body fat. This can be achieved through strength training and a nutrient-dense diet.

Stay active throughout the day

• Move regularly. Incorporate movement into your daily routine by taking short breaks to walk, stretch, or perform light exercises. Avoid prolonged periods of sitting.
• Active hobbies. Engage in hobbies that promote physical activity, such as hiking, dancing, gardening, or playing sports.

If you suspect that your metabolic age is higher than your chronological age or if you experience symptoms such as unexplained weight gain, fatigue, or hormonal imbalances, consider seeking professional guidance.

A healthcare provider or registered dietitian can perform an assessment, including body composition analysis and metabolic testing, to provide personalised recommendations.

Medicspot’s clinicians and health coaches specialise in supporting healthy metabolism during GLP-1 treatment. We help you build realistic habits that improve energy, nutrition, and long-term weight maintenance — not just short-term numbers.

Take our free online assessment to see if GLP-1 treatment could be right for you, or use the weight loss calculator below to find out instantly if you are likely to be eligible and to see how much weight you could lose.

• “Metabolic age” is a rough estimate, not a medical diagnosis.
• GLP-1 medications improve real metabolic markers like blood sugar and insulin response.
• Focus on muscle, protein, hydration, and regular movement.
• Measure progress through energy, wellbeing, and strength rather than a single score.

Disclaimer

This article is for general information only and should not be used for the diagnosis or treatment of medical conditions. Medic Spot Limited has used all reasonable care in compiling the information but makes no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. In the event of an emergency, please call 999 for immediate assistance.

There is no guarantee of a specific weight loss medication being prescribed. Clinicians will review your online questionnaire and will recommend the most appropriate weight loss treatments for you based on your answers. In some cases the clinicians may contact you for additional information. See our Terms of Service for more information.