--- title: "Weight, eating and your cycle" description: "How food and weight changes can affect periods, why eating problems deserve care at any size, and where to find support." url: "https://myruva.co/learn/weight-eating-and-your-cycle" language: "en-GB" topic: "Hormones" published: "2026-10-18" updated: "2026-10-19" author: "Ruva team" reading_minutes: 4 --- # Weight, eating and your cycle How food and weight changes can affect periods, why eating problems deserve care at any size, and where to find support. *Written and reviewed by the Ruva team · Updated 2026-10-19 · Hormones* ## Key points - Low weight, higher weight and sudden weight change can all affect your cycle. - Eating disorders can happen at any body weight. - Ask for help with eating worries. Don’t wait for your periods to stop. - Treatment can include medical care, help with food and talking therapy. Lower weight, higher weight and sudden weight loss can all affect your cycle. But if your eating or weight has changed and you’ve missed a period, that alone doesn’t tell you why. ## Food, hormones and ovulation At a low weight, the body may make less oestrogen, and periods can become irregular or stop. The Office on Women’s Health says this happens especially when weight loss comes from not eating enough or exercising too much. Tell your clinician about what you eat and how active you are, as well as your period dates. Higher weight can also affect ovulation (the release of an egg). Fat cells make oestrogen as well as the ovaries do. Changes in hormone levels can then get in the way of releasing an egg. This may help explain changes to your cycle, but how you look can’t tell you the cause. The NHS lists other reasons for missed periods, including pregnancy, stress, thyroid problems and hormonal contraception. A clinician can look at all of these rather than assuming weight explains everything. Mention your contraception and any medicines when you talk about a change. ## Eating difficulties can affect people at any weight Eating disorders can affect people at any body weight. Someone can look healthy and still be seriously ill. NIMH explains that eating disorders are illnesses that people don’t choose. Recovery is possible with treatment. Reasons to ask for help include strict rules around food, avoiding meals with other people, making yourself sick, using laxatives after eating, or feeling driven to exercise too much. Worries about weight or shape that take up a lot of your time also deserve attention. Your clinician can help you work out what’s going on. Some restricted eating has little to do with weight or shape. The NHS describes avoidant/restrictive food intake disorder (ARFID). People with ARFID avoid foods or eat very little. This can be because of texture, a frightening experience with food, or not being interested in eating. Explain the problem in your own words, even if it isn’t what you thought an eating disorder looked like. Periods may stop with an eating disorder, but that’s only one possible sign. Feeling cold, tired or dizzy, and problems with digestion can also happen. You can ask for care while you’re still having periods. The NHS advice to get help doesn’t depend on losing them. ## Physical symptoms that need urgent help Call 999 now (UK), 911 (US), or your local emergency number, if you have heart palpitations (a pounding or fluttering heartbeat) with chest pain, breathlessness, feeling faint or fainting. Call the same emergency number if someone faints during exercise or doesn’t fully recover. Contact an urgent GP service or NHS 111 today (UK), or get urgent medical care today (US and elsewhere), if dizziness when you stand up doesn’t settle or you’re passing less urine than usual. ## Planning care with your clinician If eating worries are affecting you, book a GP appointment as soon as you can in the UK, or see your doctor in the US and elsewhere. A GP may ask about your eating habits and feelings and check your physical health. You can bring someone you trust to the appointment. Treatment can include talking therapy, medical check-ups and advice on food (nutritional counselling). The mix depends on the condition and your needs. Ask how any advice about weight fits with support for eating problems. Say if being weighed or talking about food upsets you. If a clinician suggests changing your weight, ask how to do it safely with support. The Office on Women’s Health advises talking to a doctor or nurse about losing or gaining weight. You can talk about changes to your periods without setting yourself a deadline to change your body. ## Support in the UK and US Beat’s UK helplines are England 0808 801 0677, Scotland 0808 801 0432, Wales 0808 801 0433 and Northern Ireland 0808 801 0434. Beat also has a webchat. In the US, the National Alliance for Eating Disorders helps people find treatment on 866-662-1235. Its helpline isn’t a crisis service. For urgent mental health help in England, call NHS 111 and choose the mental health option. Elsewhere in the UK, contact an urgent GP service. In the US, call or text 988. Elsewhere, contact your local crisis service or an urgent care clinician. Call 999 now in the UK, 911 in the US, or your local emergency number, if you have seriously harmed yourself, your life is at risk or you can’t keep yourself safe. In the UK, Samaritans will also listen on 116 123, at any time. If there’s immediate danger, use emergency care first. ## When to get help - **Emergency:** Call 999 now (UK), 911 (US), or your local emergency number, if you have heart palpitations (a pounding or fluttering heartbeat) with chest pain, breathlessness, feeling faint or fainting. Call the same emergency number if someone faints during exercise or doesn’t fully recover. Call the same emergency number if you have seriously harmed yourself, your life is at risk, or you can’t keep yourself safe. - **Same day:** Contact an urgent GP service or NHS 111 today (UK), or get urgent medical care today (US and elsewhere), if dizziness when you stand up doesn’t settle or you’re passing less urine than usual. For an urgent mental health crisis in England, contact NHS 111 and choose the mental health option. Elsewhere in the UK, contact an urgent GP service. In the US, call or text 988. Elsewhere, contact your local crisis service or an urgent care clinician. - **Book an appointment:** Book a GP appointment as soon as you can (UK), or see your doctor (US and elsewhere), if eating, exercise or worries about weight feel hard to manage, or your periods stop or become irregular. ## Where you live Services and advice differ between countries. - **UK:** Beat gives support through helplines for each UK nation and a webchat. Medical care starts with a GP. - **US:** The National Alliance for Eating Disorders helps people find treatment on 866-662-1235. For a mental health crisis, call or text 988. - **Elsewhere:** Elsewhere, ask your doctor about local care for eating disorders and crisis services. ## Sources 1. [Weight, fertility, and pregnancy](https://www.womenshealth.gov/healthy-weight/weight-fertility-and-pregnancy), Office on Women's Health 2. [Missed or late periods](https://www.nhs.uk/symptoms/missed-or-late-periods/), NHS 3. [Eating Disorders: What You Need to Know](https://www.nimh.nih.gov/health/publications/eating-disorders), National Institute of Mental Health 4. [Overview – Eating disorders](https://www.nhs.uk/mental-health/feelings-symptoms-behaviours/behaviours/eating-disorders/overview/), NHS 5. [Where to get urgent help for mental health](https://www.nhs.uk/nhs-services/mental-health-services/where-to-get-urgent-help-for-mental-health/), NHS 6. [Heart palpitations](https://www.nhs.uk/symptoms/heart-palpitations/), NHS 7. [Fainting](https://www.nhs.uk/symptoms/fainting/), NHS 8. [Dehydration](https://www.nhs.uk/conditions/dehydration/), NHS --- This guide is general information to help you keep and use your own records. It isn’t medical advice. If you’re worried about a symptom, or something changes suddenly, talk to a doctor, nurse or pharmacist.