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    Written by certified Naturopath Suzanne Shares

    - 8 years of experience with over 1600 clients in the Netherlands and Europe.

When you change your body and your daily life

Maybe you feel like you eat very little and see hardly any change on the scale. Then you’ll probably hear that your body has gone into power-saving mode. That sounds as if losing fat becomes impossible as soon as you eat too little. That’s not how it works. While losing weight, your energy needs and activity levels may change, but the laws of energy balance still apply. It helps to understand what researchers mean by metabolic adaptation, rather than using the term as an all-encompassing diagnosis.

This article provides concrete examples and direct access to scientific research. This will help you better distinguish between what you observe yourself and what the available studies show.

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You often hear the word power saving mode

Your body adapts, but does not increase energy expenditure.

What do people mean by the savings mode?

Maybe you feel like you’re eating very little and you barely see any change on the scale. Then you’ll probably hear that your body has gone into starvation mode. That makes it sound as if losing fat becomes impossible as soon as you eat too little. That’s not how it works. While losing weight, your energy requirements and activity levels may change, but the laws of energy balance still apply. It helps to understand what researchers mean by metabolic adaptation, rather than using the term as an all-encompassing diagnosis.

The key is a practical, personal approach in which daily routines are not confused with a medical diagnosis or a proven supplement effect.

The term starvation mode is often used when losing weight becomes more difficult than expected. It can sound reassuring: you’re not doing anything wrong, your body has simply flipped a switch. But it can also be confusing if you then hear that you actually need to eat more to lose fat. The reality is more nuanced. The body constantly needs energy. At a lower body weight and with changing daily activity, energy expenditure may decrease. This makes a weight-loss journey less predictable, but it does not mean that your body is no longer using energy.

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A lighter body burns differently

Your energy needs change with your situation.

Why does your metabolism change during weight loss?

When your body gets lighter, on average less energy is needed to move and maintain it. You may also unconsciously move less when you are tired or eat little. You might maintain the same eating pattern as at the beginning, but the difference between energy intake and expenditure may have become smaller. That is one of the reasons why a weight loss rate rarely remains the same every week.

The core is an achievable, personal approach in which daily routines are not confused with a medical diagnosis or a proven supplement effect.

An example makes it understandable. If you are a lot lighter than a few months ago, walking and moving on average costs less energy. You may also move less spontaneously because you are tired. Your previous meal pattern may then yield a smaller energy difference than when you started. This does not mean that you should always look for the answer in even less food. See if your daily routine, sleep, and activity have changed and if you are getting enough nutrients to continue feeling good.

What is adaptive thermogenesis?

Scientific explanation for a real, but often exaggerated, phenomenon.

What does research say about metabolic adaptation?

Adaptive thermogenesis is the change in energy expenditure that is greater than you would expect based on lost body mass alone. Researchers study how large that effect is and under what circumstances it occurs. A 2026 position paper describes that commonly heard estimates of an additional 10–15 percent drop may be overestimates, especially when people have reached weight stability again. The adaptation exists, but varies greatly by person and situation.

Researchers use the term adaptive thermogenesis for energy adjustments. It describes an additional change in energy expenditure beyond what you would expect from the changed body mass alone. The magnitude and duration vary, and the measurement methods are not without limitations. The 2026 ISSN publication emphasizes that popular estimates sometimes overestimate the magnitude. A scientific mechanism can thus quickly be exaggerated in a simple online statement. Read the original source when you want to understand which figures apply to which situations.

The ISSN publication of October 13, 2026, is a scientific position based on literature, not a new experiment with participants. The authors describe that adaptive thermogenesis can occur during an energy deficit or weight loss, but is not inevitable and can decrease significantly after weight stabilization. They also distinguish between changes in body mass, spontaneous movement, and an additional drop in resting metabolism. A stationary scale therefore does not prove that your body is in a permanent conservation mode. It is useful to look at trends over several weeks and your daily energy.

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The scale measures more than fat

Moisture can temporarily mask a drop.

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Why short periods of stagnation are misleading

Daily measurements fluctuate with hydration, salt intake, your menstrual cycle, exercise, and the contents of your digestive tract. That is why the same number on three different mornings tells you little about what will happen over the next month. Look at trends over several weeks and consider how your clothes fit or how strong you feel. Try not to respond to weight fluctuations with increasingly strict rules.

The key is a practical, personal approach that does not mistake daily routines for a medical diagnosis or the proven effect of a supplement.

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Why eating less and less is not a good idea

Adequate nutrition helps you function and recover.

What are the disadvantages of extreme restriction?

Very low energy intake can compromise your daily energy, muscle maintenance, mood, and ability to move. It is also difficult to sustain such a strict regime over the long term. This does not mean that eating more automatically leads to weight loss, but it does mean that eating less and less is not always the right solution. Eat a sufficiently varied diet and ask a dietitian for personal advice if you consistently eat very little.

The key is an achievable, personal approach in which daily routines are not confused with a medical diagnosis or a proven supplement effect.

Consistently eating too little can affect your energy, nutritional status, mobility, and ability to perform your daily tasks properly. If you notice that you are becoming increasingly strict while feeling worse, that is reason to reconsider your approach. An appropriate amount of food depends on several factors, including body composition, activity, age, and health. It is not sensible to prescribe the same minimum calorie limit for everyone. A dietitian can help determine what is sufficient and responsible in your situation.

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View your actual week, not just a calculation

Observing honestly is not a judgment.

How do you investigate a weight loss plateau?

Look at your meals, snacks, drinks, exercise and sleep over a typical week. Perhaps you are not eating enough during the day and find it difficult not to snack in the evening. Perhaps you have become less active. It can also be helpful to see whether your original goal still suits your health and body. The Netherlands Nutrition Centre and a dietitian can provide useful practical guidance.

The key is an achievable, personal approach in which daily routines are not confused with a medical diagnosis or a proven supplement effect.

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A realistic next step

The solution doesn't have to be stricter.

What could you do differently tomorrow?

Start with regular, balanced meals and exercise that you can sustain. Don't constantly reduce your calorie intake just because the scale didn't show the desired number one week. Give yourself time to assess patterns and seek individual guidance if necessary. For further explanation, you can also read the existing Suzanne Shares page about not being able to lose weight anymore. It focuses on the broader context of a weight plateau.

Further in-depth information at Suzanne Shares: https://www.suzanneshares.nl/pages/afvallen-lukt-niet-meer

It can help to temporarily shift your focus away from daily weigh-ins and look at your overall week. Are you eating regularly, do you have enough energy to exercise, and can you sustain your choices? Reframe goals that require excessive control in your schedule. If you don't see a clear pattern after several weeks, personal guidance can provide more insight. The existing Money Page about not being able to lose weight anymore contains a broader explanation of plateaus, lifestyle, and possible next steps.

Frequently Asked Questions

What does this topic mean for my daily life?

Maybe you feel like you’re eating very little and see hardly any change on the scale. Then you’ll probably hear that your body has gone into “starvation mode.” That makes it sound as if losing fat becomes impossible as soon as you eat too little. That’s not how it works. While your energy needs and activity levels can change during weight loss, the laws of energy balance still apply. It helps to understand what researchers mean by metabolic adaptation, rather than using the term as an all-encompassing diagnosis.

What does scientific research show about this?

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What can I investigate myself in a calm way?

Daily measurements fluctuate with hydration, salt intake, your menstrual cycle, exercise, and the contents of your digestive tract. That’s why the same number on three different mornings tells you little about what will happen over the next month. Look at trends over several weeks and consider other factors, such as how your clothes fit or your strength levels. Try not to respond to weight fluctuations with increasingly strict rules.

What is a common misconception?

Very low energy intake can compromise your daily energy levels, muscle maintenance, mood, and ability to move. It is also difficult to sustain such a strict regime over the long term. This does not mean that eating more automatically leads to weight loss, but it does mean that eating less and less is not always the right solution. Eat a sufficiently varied diet and ask a dietitian for personal advice if you consistently eat very little.

When is personal guidance worthwhile?

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Greater understanding allows room for appropriate choices

Start with regular, balanced meals and exercise that you can sustain. Do not continually reduce your calorie intake just because one week does not show the desired number. Give yourself time to assess patterns and seek individual guidance if necessary. For further explanation, you can also read the existing Suzanne Shares page about being unable to lose more weight. It focuses on the broader context of a weight plateau.

Research and sources:

Scientific overview: adaptive thermogenesis during weight loss

Medical overview: management of a weight plateau

Further at Suzanne Shares: Why the scale sometimes stays still

Read more or discuss personal questions about your daily habits.

More background

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Eating too little and the starvation mode: why do you sometimes stop losing weight?

Does starvation mode really exist? Read how your energy needs adapt, what a plateau means, and why eating extremely little is not a sensible solution.

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