Hormonal Weight Gain: what it is and how we help

Hormonal weight gain at a glance

Hormones influence where you store fat, how hungry you feel and how much muscle you keep. Hormonal weight gain is common around perimenopause and menopause, with PCOS, with an underactive thyroid, during periods of high stress and with poor sleep. The good news is that the same foundations, strength training, protein, sleep and stress management, help across all of these.

Signs your hormones may be involved

• Weight gain around the middle despite no change in eating
• Cravings, especially for sugar, and energy crashes
• Irregular periods, hot flushes or new acne
• Feeling cold, tired and sluggish
• Poor sleep and high stress

Common hormonal causes

• Menopause: falling oestrogen shifts fat to the abdomen and speeds muscle loss. See menopause symptoms.
• PCOS and insulin resistance: higher insulin makes fat storage easier. See PCOS.
• Underactive thyroid: slows metabolism. See thyroid disorders.
• Chronic stress and short sleep: raise cortisol and appetite hormones.

How is it treated?

Your GP can test for thyroid problems, PCOS and diabetes, and discuss HRT for menopause. Alongside medical care, lifestyle change remains the most effective lever for weight.

How we help in Chiswick

• Blood tests: thyroid, HbA1c, hormone and vitamin markers.
• InBody scan: shows visceral fat and muscle so you can track what matters.
• Fitness and nutrition: strength-focused training and eating that steadies blood sugar.
• Acupuncture and Ayurveda: support for stress, sleep and menopausal symptoms.

Can hormones stop you losing weight?

Hormones can make weight loss slower and change where fat is stored, but they rarely stop it entirely. An untreated underactive thyroid, insulin resistance, the menopause and some medicines, such as steroids or certain antidepressants, all have an effect. Once any medical cause is treated, the same approach of strength, protein, sleep and consistent activity works, though progress may be slower.

Cortisol and stress-related weight gain

Long-term stress raises cortisol, which increases appetite, particularly for sugary and fatty foods, and encourages fat storage around the middle. Poor sleep has a similar effect. Cortisol tests are only useful when a doctor suspects a specific condition, so for most people the practical focus is on sleep, stress management and regular meals.

Which tests are useful?

Helpful blood tests include thyroid function, HbA1c for blood sugar, lipids and, where relevant, sex hormones. For women over 45 with perimenopausal symptoms, NICE advises diagnosis from symptoms rather than hormone blood tests, because levels fluctuate from day to day. Your GP or our practitioners can help decide what is worth testing.

What to expect at Omnia

Your first appointment covers your weight history, cycle or menopause stage, sleep, stress, medication and goals, with an InBody scan and blood tests where useful. Your plan combines strength-focused training, eating patterns that steady blood sugar and support for sleep and stress, with repeat measurements every few weeks.

What you can do at home

• Strength train two or three times a week
• Aim for 25 to 30 grams of protein at each meal
• Keep a regular bedtime
• Reduce alcohol, which disrupts sleep and hormones

For what the research shows about HRT and weight, see our guide to whether HRT causes weight gain.

See our guide to when menopause starts and the first signs.

Blood tests that can help

Blood tests can check thyroid, blood sugar and hormone causes of weight change. Our Hormone and Thyroid Panel (£99) covers thyroid and sex hormones together. See our guides to blood tests for PCOS and prediabetes blood tests. Blood tests are taken at our Chiswick clinic, with no GP referral, and you receive a clear results report, with a GP review available at an additional cost if you would like one. See every blood test and price.

Visit our weight management hub. Omnia Lifestyle, Chiswick W4. Book online or call 020 4515 0000.