How to Revive Your Metabolism After 40
Author: Roxane Shymkiw
Are you over 40, feeling tired all the time, having trouble losing weight and maintaining muscle tone, or noticing fat appearing in new places? You can’t imagine it. Metabolism naturally changes as we age, but the good news is that there are practical ways to support your metabolism and restore steady energy.
What is metabolism?
Let’s start with the basics. Metabolism isn’t just about “burning calories.” It’s the entire process your body uses to convert the food you eat into energy so your cells can function. It involves the digestion, absorption and transport of nutrients into cells as well as the conversion of glucose into ATP, the energy that powers every cell. Even when you are resting, your body uses energy to breathe, circulate blood, regulate hormones and maintain body temperature. Metabolism is how your body uses energy.
Energy is spent in three main ways:
Basal Metabolic Rate (BMR) (60-75%):
Physical activity (15-30%):
Thermic effect of food (TEF (10%):
After 40, many shifts can affect these processes, especially hormonal changes, sleep disturbance, stress and gradual muscle loss. The key is to support it, not fight it.
Why does metabolism change after 40?
After we turn 30, we begin to lose 3-5% of our muscle per decade if we don’t actively work to maintain it. After 40, we naturally start to lose muscle mass, even if we are active. Muscle burns more energy than fat, even at rest, and less muscle can lead to a lower resting metabolism.
As we age, the body becomes less efficient at burning calories and our metabolic rate tends to slow. For women, hormonal changes also play a role. Declining estrogen can affect how the body stores fat, regulates appetite, and manages blood sugar. Wide fluctuations in blood sugar can increase insulin resistance over time, making weight management and energy stability more difficult. Decreases in testosterone and thyroid hormones can also affect the body’s energy expenditure. Add in busy schedules, stress and lack of sleep, and your metabolism can feel like it’s working against you. The strategies that worked in our 30s may no longer be enough, but there are several ways to support your metabolism naturally.
How to support your metabolism naturally
You don’t need extreme diets or hours of cardio. These lifestyle habits can boost your metabolism:
Prioritize strength training. Resistance training (with adequate protein intake) builds and maintains muscle, which supports resting metabolism. Tip: Strength training can increase calorie burn for up to 24-48 hours after training.
Eat enough protein. Protein is one of the most powerful tools for supporting metabolism. It helps maintain muscle mass, keeps you fuller for longer, stabilizes blood sugar and requires more energy to digest than fats or carbohydrates. Tip: Include a quality source of protein at every meal and snack to support metabolic health and sustained energy. Good sources of protein include lean meats (chicken, turkey, lean beef), fish, eggs, legumes, dairy products, and plant proteins such as soy, chia seeds, and flaxseed.
Balance your breakfast. Starting the day with protein instead of just carbs helps stabilize blood sugar and reduce energy crashes later in the day.
Stay consistently active. Daily movement, including walking, resistance training and regular physical activity, plays a key role in maintaining an active metabolism and contributes to your overall energy expenditure.
Protect sleep and find ways to manage stress. Chronic high stress and sleeping less than six hours a night can increase hunger hormones and slow metabolic function. Quality sleep is fundamental and engaging in relaxing activities can support an active metabolism.
Stay hydrated. Water supports every metabolic process in the body and drinking water can help boost basal metabolism.
Inflammation, poor gut health and nutrient deficiencies it can also quietly slow the metabolism.
Can certain foods increase metabolism?
Some foods are caloric, meaning your body burns extra energy to digest and process them. Protein has the highest thermic effect, using 15-30% of its energy value for metabolism, compared to 5-10% for carbohydrates and 0-3% for fats. Green tea, chili peppers, ginger, coffee, coconut and MCT oils, and spices like cinnamon and turmeric are some of the best metabolism-boosting foods.
Reviving your metabolism isn’t about chasing a number on the scale. It’s about more consistent energy, better blood sugar control, improved mood, stronger muscles and long-term vitality. When you constantly feed your metabolism, it responds.
Ready to boost your metabolism?
Interested in learning more about thermogenic foods that naturally boost metabolism, help balance blood sugar and maintain energy? Join us Start the BurnCooking course on March 19, 2026. We’ll discuss how these foods support metabolism and ways to incorporate them into daily meals.
If you’re ready to feel like yourself again and looking for ways to boost your metabolism, look no further FREE CONSULTATION. At No Shoes Nutrition, we work with individuals and groups to explore what drives your metabolism and design custom plans to support energy production and hormonal balance. The waiting list for the next Hormone Harmony Group program is now open!
