Can Menopause Affect My Weight?
Menopause can affect body weight, body-fat distribution, muscle mass and metabolism, but there is an important medical distinction: Menopause itself is not necessarily the main reason women gain overall weight. Ageing is a major driver of weight gain, while the menopause transition appears to have a particularly strong effect on where fat is stored — especially increasing abdominal/visceral fat and reducing lean muscle mass. What happens to your weight during menopause? During perimenopause and the years around the final menstrual period, research shows several changes can occur:
- total body fat tends to increase
- abdominal fat increases
- visceral fat can increase
- lean muscle mass decreases
- fat distribution shifts from more peripheral areas toward the abdomen
- energy expenditure can decrease
- insulin sensitivity may worsen
- cholesterol and other cardiometabolic risk factors can change Importantly, your scale weight and your body composition are not the same thing. You can have relatively little change on the scale while losing muscle and gaining fat, particularly around your waist.
2. Why does menopause cause more abdominal fat? One of the most important hormonal changes is the decline in ovarian oestrogen. Oestrogen affects how your body stores and uses energy and influences adipose tissue (body fat). When oestrogen levels decline around menopause, there is a tendency for fat distribution to shift: Before menopause: More fat tends to be stored around the:
- hips
- thighs
- buttocks After menopause: There is a greater tendency toward:
- abdominal fat
- visceral fat
- increased waist circumference This is sometimes described as a shift from a more "gynoid" pattern toward a more "android" or central pattern. The International Menopause Society's 2025/2026 recommendations specifically identify the menopause-related decline in oestrogen as a major cause of increased abdominal adiposity in midlife women.
3. What is visceral fat and why does it matter? This is particularly important. Subcutaneous fat sits underneath your skin. Visceral fat is stored deeper inside the abdomen around organs such as the:
- liver
- intestines
- pancreas Visceral fat is metabolically active and is associated with a higher risk of:
- insulin resistance
- type 2 diabetes
- high blood pressure
- abnormal cholesterol
- cardiovascular disease
- metabolic syndrome Therefore, menopause-related changes in waist circumference and abdominal fat can matter even if your overall BMI hasn't changed dramatically.
4. Why do you lose muscle during menopause? This is another major part of the picture. With increasing age, women naturally lose muscle mass and strength. During the menopause transition, research shows that the rate of fat gain increases while lean mass declines. Less muscle can mean: Less muscle → lower resting energy expenditure → fewer calories burned at rest. This doesn't mean your metabolism suddenly "breaks" at menopause. Rather, over years there can be a gradual reduction in:
- muscle mass
- physical activity
- resting energy expenditure
- total daily energy expenditure The International Menopause Society identifies the age-related decline in total energy expenditure as an important contributor to midlife weight gain.
5. Ageing vs menopause — this is VERY important You will often hear: "Menopause makes you gain weight." That's an oversimplification. The medical evidence suggests that overall weight gain during midlife is predominantly related to chronological ageing, while the menopause transition has a particularly important effect on fat redistribution and body composition. In other words: Ageing tends to contribute to:
- gradual weight gain
- reduced energy expenditure
- muscle loss
- reduced activity Menopause/hormonal changes tend to contribute particularly to:
- increased abdominal fat
- increased visceral fat
- loss of lean mass
- changes in fat distribution
- metabolic changes These processes happen at the same time, which is why it can feel as though menopause suddenly caused weight gain.
6. What happens to your metabolism? Your total daily energy expenditure consists of several components, including:
- energy required to keep your body functioning at rest
- physical activity
- exercise
- digestion/food processing As you age, muscle mass and activity can decline. Research following women through the menopause transition has found changes in energy expenditure and physical activity alongside increases in visceral fat. So you may find that: The same amount of food and activity that maintained your weight at 35 doesn't necessarily maintain exactly the same weight at 50. That doesn't mean you have done anything wrong. Your body's energy requirements and body composition have changed.
7. Why does your stomach sometimes become the main problem? This is one of the most characteristic changes. You may notice:
- waist getting larger
- stomach becoming softer
- more fat around the abdomen
- less fat around hips/thighs relative to the abdomen
- clothing fitting differently even when your weight hasn't changed much Research from the SWAN cohort found that during the menopause transition, the rate of fat gain approximately doubled, while lean mass declined; these changes continued through roughly the first two years after the final menstrual period before slowing. Importantly, overall weight itself did not suddenly accelerate at menopause. This is a really useful distinction: Your body can change substantially even when the number on the scale doesn't change dramatically.
8. Can menopause affect appetite? Potentially, yes, although this is complicated. Hormonal changes can interact with systems involved in:
- hunger
- satiety
- energy expenditure
- fat storage
- insulin sensitivity But researchers don't consider appetite changes to be the sole explanation for menopause-related weight changes. Sleep and mood are also important. For example: Night sweats → poor sleep → fatigue → less activity → greater difficulty maintaining healthy eating/exercise patterns → possible weight gain. Sleep disturbance and mood symptoms can therefore indirectly contribute to weight management difficulties during menopause.
9. Does poor sleep make menopause-related weight gain worse? It can. Menopause can cause:
- night sweats
- hot flushes
- insomnia
- repeated waking
- anxiety
- daytime fatigue Poor sleep can make it harder to maintain:
- regular exercise
- healthy eating
- appetite regulation
- normal energy levels The International Menopause Society specifically recommends addressing menopause symptoms, including vasomotor symptoms, sleep disturbance and mood disorders, because these can interfere with healthy lifestyle behaviours used for weight management. So if you're struggling with weight during menopause, sleep should not be overlooked.
10. Does menopause cause insulin resistance? Menopause is associated with changes in cardiometabolic health, including changes in glucose metabolism and insulin sensitivity. The accumulation of abdominal/visceral fat is particularly relevant because visceral adiposity is associated with insulin resistance. Research reviews have linked the menopause transition with changes in:
- insulin sensitivity
- glucose metabolism
- lipid profile
- abdominal fat
- cardiovascular risk. This is one reason waist circumference and metabolic health can be useful things to monitor during midlife—not just body weight.
11. Does HRT make you gain weight? This is a very common concern. Menopausal hormone therapy (MHT/HRT) should not generally be viewed as a weight-gain treatment or a weight-loss treatment. The current International Menopause Society recommendations state that MHT:
- effectively treats menopause symptoms
- does not have a direct effect on body weight
- should not be prescribed specifically for weight management However, oestrogen-containing MHT may attenuate some menopause-related changes in fat distribution and may improve insulin resistance in some circumstances. That is different from saying HRT causes weight loss. So: HRT ≠ weight-loss medication. But appropriately treating hot flushes, sleep problems and other symptoms can make it easier for someone to maintain healthy lifestyle behaviours.
12. What should you actually monitor? During perimenopause and menopause, I would look beyond the scale. Weight Track:
- body weight
- weight trend over months rather than day-to-day fluctuations Waist Track:
- waist circumference
- how your clothes fit
- abdominal changes Body composition If clinically appropriate:
- muscle mass
- body-fat percentage
- lean mass Metabolic health Discuss with your doctor whether you need monitoring of:
- blood pressure
- fasting glucose/HbA1c
- cholesterol/lipid profile
- other cardiovascular risk factors Lifestyle Track:
- resistance training
- aerobic exercise
- daily movement/steps
- protein intake
- fibre intake
- sleep
- alcohol
- menopause symptoms
13. What is the best approach to preventing muscle loss and abdominal fat? The evidence supports focusing on body composition and metabolic health, rather than simply trying to make the scale go down. Resistance training is particularly important Examples include:
- weight training
- resistance bands
- bodyweight exercises
- squats
- lunges
- rows
- presses The goal is to preserve or build muscle. Aerobic activity Walking, cycling, swimming, running or other cardiovascular exercise helps with:
- cardiovascular health
- energy expenditure
- metabolic health
- maintaining fitness Nutrition A balanced diet emphasizing:
- adequate protein
- vegetables
- fruit
- whole grains/high-fibre carbohydrates
- legumes
- healthy fats
- minimally processed foods can support weight and metabolic health. Lifestyle interventions combining nutrition and exercise may help reduce increases in body adiposity during the menopause transition, although the evidence base for specific interventions has historically been less robust than we would like.
Medical sources and links International Menopause Society — 2025/2026 Recommendations and Key Messages This is one of the most current major international sources on midlife health and menopause. It specifically addresses ageing, menopause, abdominal adiposity, energy expenditure, MHT and weight management. International Menopause Society — Recommendations and Key Messages International Menopause Society — Women’s Midlife Health and Menopause Peer-reviewed recommendations published in Climacteric. International Menopause Society publication PubMed — Changes in Body Composition and Weight During the Menopause Transition SWAN longitudinal research examining fat mass, lean mass and weight around the menopause transition. PubMed — Changes in body composition and weight during menopause PubMed — Body Weight and Fat Mass Across the Menopausal Transition Review examining hormones, fat accumulation, lean mass, abdominal fat and energy expenditure. PubMed — Body weight and fat mass across the menopausal transition PubMed — Understanding Weight Gain at Menopause International Menopause Society review explaining the distinction between overall weight gain and menopause-related changes in body composition and abdominal fat. PubMed — Understanding weight gain at menopause PubMed — Body Composition and Cardiometabolic Health Across the Menopause Transition Reviews changes in weight, fat distribution, energy expenditure, glucose metabolism, lipids and cardiovascular risk. PubMed — Body composition and cardiometabolic health PubMed — Increased Visceral Fat and Decreased Energy Expenditure During the Menopausal Transition Longitudinal research examining visceral fat, energy expenditure, oestrogen and physical activity. PubMed — Increased visceral fat and decreased energy expenditure NICE — Menopause: Diagnosis and Management (NG23) Clinical guideline covering menopause management and lifestyle considerations. NICE — Menopause: diagnosis and management