Menopause weight gain: why it happens, how long it lasts and what helps

Your clothes feel tighter, but you haven't changed what you eat. The scales creep up a little each month. Your shape seems different too, softer around the middle, and the things that used to work don't seem to shift it.

Menopause weight gain is very common, and you're not imagining it. The NHS says weight gain during perimenopause and menopause is common, and it often happens around the stomach and upper body. Women's Health Concern, the patient arm of the British Menopause Society, says it affects over half of all women.

So does menopause cause weight gain? Partly. Falling oestrogen changes where your body stores fat, and you lose some muscle as you get older. But what you eat and drink, and how much you move, still matter most. Here's what's going on, how long it tends to last, and what can help.

Does menopause cause weight gain?

It plays a part, but it isn't the only thing going on. Women's Health Concern says changes in hormones, metabolism and lifestyle all tend to land at the same time.

• Hormones. As oestrogen falls, your body becomes more likely to store fat deep inside your tummy. Before perimenopause, weight gain tends to spread more evenly.
• Muscle. You lose some muscle as a normal part of ageing. This lowers the rate at which your body uses up calories.
• Everyday life. Some women move less in midlife. Others eat or drink a little more. Women's Health Concern says what you eat and drink, and how much you move, are still the biggest factors.

A large US study called SWAN followed 1,246 women through the menopause, with regular body scans (Greendale and others, 2019). Their weight rose slowly and steadily, at about the same rate before and during the change. But underneath, something shifted. Once the menopause transition began, fat gain roughly doubled, and the women started to lose a little muscle.

So the scales may not tell the whole story. Your shape can change even when your weight doesn't jump.

Perimenopause weight gain: why it can start in your forties

Many women notice changes while they still have periods. That fits the SWAN findings: the faster fat gain began at the start of the transition, before the last period.

Women's Health Concern says women may gain around 1.5kg a year on average during perimenopause. Estimates vary between studies, and everyone is different, so don't measure yourself against an average.

Other menopause symptoms can make it harder too:

• Poor sleep. The Menopause Charity says hot flushes and night sweats can disturb sleep, and poor sleep can increase food cravings and lead to weight gain.
• Aching joints. The charity also says lower oestrogen can cause joint pain, which can make exercise harder. See our page on menopause joint pain.
• Low mood. Women's Health Concern says poor sleep, low mood and aching joints all make managing weight harder, both physically and emotionally. It adds that eating for comfort is very common when you're not feeling yourself.

How long does menopause weight gain last?

There's no fixed answer, but the SWAN study gives a clue. The faster fat gain and muscle loss carried on until about 2 years after the last period. After that, they levelled off (Greendale and others, 2019). Weight also stopped rising once the transition was over.

That doesn't mean any weight you've gained will go by itself. And it's an average across many women, not a promise for you. But it may help to know the biggest changes seem to bunch up around the transition, rather than carrying on for ever.

Does HRT cause weight gain?

Lots of women worry about this. Women's Health Concern says there's no evidence that HRT causes weight gain. Some types can cause bloating or fluid retention at first, and this usually settles over time.

If you're worried, talk to your GP or pharmacist. Please don't stop or change any medicine without asking them first.

Other causes of weight gain

It's worth ruling these out, rather than putting everything down to "just the menopause".

Possible cause	Other signs to look out for
Underactive thyroid	Feeling very tired, feeling cold, constipation, low mood, dry skin or hair, irregular or heavy periods
Fluid build-up from heart failure	Sudden weight gain, swollen feet, ankles, legs or tummy, feeling out of breath
Bloating	A tummy that swells during the day and goes down again (see menopause bloating)

An underactive thyroid is easy to miss. The NHS says its symptoms often come on slowly. Its main cause in the UK, Hashimoto's disease, is most common in women and usually starts between the ages of 30 and 50. Many of its signs, such as tiredness, low mood and period changes, look a lot like perimenopause. The NHS says it's important to get them checked by a GP.

What can help with menopause weight gain?

There's no quick fix. Women's Health Concern warns that fad diets often lead to a yo-yo pattern of losing weight fast and then putting more back on. It says very strict diets, long fasts and cutting out whole food groups aren't recommended at this stage, because your bones and heart need good nutrition. The aim is something you can keep doing for years.

These ideas all come from that factsheet.

Start by noticing. Keep a food and activity diary for a few days. Eat and move as you normally would. It shows you where small changes could fit.

Make small, steady changes to how you eat.

• Have regular meals, rather than long gaps that leave you starving.
• Eat slowly, and stop when you're satisfied rather than stuffed.
• Try a modest first helping. Wait, then have more if you're still hungry.
• Cut down on unplanned snacking and grazing.
• Notice when you eat out of boredom or because you feel low.

Think about alcohol. Alcohol has almost as many calories as fat, and when you drink you're more likely to reach for salty or sweet snacks. To keep health risks low, women are advised not to drink more than 14 units a week.

Move a little more, most days. A bit more activity on most days is better than one big effort a week. If you walk around 3,000 steps a day, try building up to 5,000. If walking is hard, swimming or cycling are good options.

Build some strength. Losing muscle is part of the problem. Regular, gentle strength exercise, such as squats, lifting light weights or using resistance bands, helps build muscle. It's not about pumping iron at the gym. Check with a healthcare professional before starting a new type of exercise.

Measure more than your weight. Try not to weigh yourself more than once a week. Use a tape measure on your waist and hips too. Your shape may change before the scales do.

Expect slip-ups. Everyone has them. It's about being a bit better, steadily, not about being perfect.

What your GP can offer

• Check for other causes. For example, an underactive thyroid.
• Support to lose weight safely. The NHS says a GP can give advice and refer you to a weight management programme. These can include one-to-one coaching, group support and talking therapy. You can refer yourself to some programmes, and you may be able to see a dietitian.
• Weight loss medicines. Depending on your weight and other health conditions, these may be an option to discuss with your GP. The NHS says they're usually given alongside diet and activity advice.
• Help with other symptoms. If poor sleep, low mood or aching joints are getting in the way, ask about treatment options, including HRT. Women's Health Concern says weight can be easier to tackle when other menopause symptoms are under control.

When to see a GP about weight gain

Book an appointment if:

• you're losing weight without trying
• you've gained weight quickly and don't know why (get an urgent appointment if you're also swollen or out of breath)
• you're gaining weight and feel tired, cold, low or constipated
• your tummy is swollen and doesn't go down
• you'd like support to lose weight safely

You might also find these useful: menopause belly, which looks at why fat moves to your middle, menopause bloating and perimenopause fatigue. Or see the full list of perimenopause symptoms.

This page is general information, not medical advice. If you're worried about any symptom, please talk to your GP or pharmacist.

See all perimenopause symptoms