Menopause and metabolism: What’s really going on

Menopause is not a condition or a disease. It is a natural transition, just like adolescence. It is not a medical problem; however, it does bring significant hormonal changes, much like the teenage years.

These changes, particularly the decline in oestrogen, can lead to various unpleasant symptoms for some women. Because oestrogen is involved in so many functions throughout the body, its decline during menopause can affect a wide range of systems, from metabolism and mood to bone density and cardiovascular health.

The good news is that diet and lifestyle can play a powerful role in managing many menopausal symptoms. Unlike the major hormonal shifts of menopause which we can't control, our daily habits are within our power to change.

Why do many women experience weight gain even if their food intake has not changed?

1. The role of oestrogen

The decline of oestrogen is one of the main shifts that happens during the menopause. Oestrogen doesn't play a role only in reproduction. It plays a role in bone health, metabolism, fat distribution and many other areas.

We notice that during menopause, fat tends to shift from the hips and thighs to the abdominal area. Often this is visceral fat, which wraps around internal organs and is linked to increased risk of heart disease, type 2 diabetes, and inflammation. This not only has an impact on women's confidence and body image but also increases the risk of cardiovascular disease.

Interestingly, body fat cells have the ability to produce small amounts of estrogen, particularly a form calledestrone, through an enzyme called aromatase. This enzyme converts androgens (like testosterone) into estrogen. This low-level production of estrogen by fat tissue can be seen as the body’s natural, compensatory response to declining ovarian function. However, it is important to know that maintaining a healthy level of body fat is crucial for long-term health.

2. Slower metabolism

We know that metabolism naturally slows down with age, but this slowdown becomes more pronounced during menopause. A major factor behind this is the loss of lean muscle mass. After age 30, lean muscle declines at a rate of about 3–8% per decade, with the loss accelerating after age 50. Since muscle tissue is metabolically active, this reduction directly lowers the number of calories your body burns at rest.

In addition, the natural decline in hormones like estrogen, progesterone, and growth hormone affects how your body stores fat, uses energy, and regulates hunger signals. These changes combined contribute to the metabolic shifts many women experience during menopause.

Whatever the cause, when metabolism slows but food intake stays the same, it means you may be consuming more calories than your body needs. Those extra calories get stored as fat, leading to gradual weight gain over time. For some women, this process happens more slowly, while for others it may be more noticeable.

3. Disturbed sleep

Many women experience sleep disturbances in this transitional period. Poor sleep increases hunger hormones (ghrelin), reduces satiety hormones (leptin), and spikes cortisol, all of which could contribute to weight gain.

If you’re waking up at 2am or struggling to fall asleep, you’re likely to feel fatigued, and your appetite may become harder to manage, leading to irregular eating patterns. There are some nutrition strategies to help with better sleep. For example, magnesium-rich foods (like leafy greens, pumpkin seeds, and whole grains), a bedtime routine, and cutting back on caffeine and alcohol can all improve sleep. In some cases, supplements might be appropriate, depending on individual needs.

Why cutting calories doesn’t work in menopause (and what to do instead)

Drastic calorie restriction might work short-term, but it often leads to muscle loss, fatigue, and even more stubborn weight gain later. And as I discussed earlier, muscle mass is something we want to maintain and grow, not lose. Not only in terms of preventing weight gain, but also for optimal long-term overall health.

During menopause, your body responds far better to nourishment than to deprivation. In my practice, I use the guiding principle: “enrich your plate, don’t restrict it.” By focusing on quality (adding enough protein, fibre, and healthy fats), you support your metabolism, energy, and hormone balance. Combined with strength training and good sleep, this approach is far more effective (and sustainable) than any crash diet.

At this stage of life, your body isn’t asking for punishment or restriction- it’s asking for care, consistency, and compassion.

Where do I start?

The first step is understanding the changes happening in your body and identifying what’s truly driving your symptoms. Hormones are part of the picture, but they’re not the whole story. Factors like lifestyle, stress, muscle mass, sleep, and nutrition also play a major role in how you feel and how your body responds during menopause. While you can’t change your age or genetics, you can take control of your daily habits.

Understanding your body and giving it what it needs can lead to better health and more confidence in midlife and beyond.

Lasting change doesn’t require perfection; it requires consistency. So start with changes that are small, realistic, and tailored to fit your life. That could mean walking after dinner, prepping veggies on Sunday, or keeping healthy snacks on hand. Progress, not perfection, is the key.