If you have polycystic ovary syndrome (PCOS), you may have heard that cutting carbohydrates is the key to managing insulin resistance and losing weight. The ketogenic, or keto, diet is often promoted as a way to improve blood sugar control, reduce body weight and balance hormones.
But does keto actually help with PCOS, and do you need to stop eating rice, roti or other carbohydrate-rich foods to improve your health?
The answer is more nuanced than social media often suggests. Research indicates that very-low-carbohydrate diets may improve certain metabolic measures in some women with PCOS. However, the evidence is still developing, and keto has not been established as the best diet for everyone with PCOS. A balanced, sustainable eating pattern can support metabolic health without requiring extreme carbohydrate restriction. 1
Quick Answer: Is Keto Good for PCOS?
Keto may help some women with PCOS improve short-term weight and metabolic outcomes, but it is not essential for managing the condition. Studies have reported improvements in measures such as insulin resistance and body weight, although results vary and many studies are limited by small sample sizes, short follow-up periods and differences in study design. 2 4
A moderately lower-carbohydrate diet or a balanced eating pattern that includes fibre-rich carbohydrates may also be appropriate. The best approach is one that meets your nutritional needs, supports your health and is realistic to maintain.
What Is the Connection Between PCOS and Insulin Resistance?
Insulin is a hormone that helps glucose move from the bloodstream into cells for energy. Insulin resistance occurs when the body’s cells respond less effectively to insulin, so the body may produce more insulin to compensate.
Insulin resistance is common in PCOS, although not every woman with PCOS has it. Higher insulin levels can contribute to increased androgen production in the ovaries and may affect processes involved in ovulation. Androgens are hormones that include testosterone.
These changes can be associated with symptoms such as irregular periods, acne and excess facial hair. However, PCOS is a complex hormonal and metabolic condition, and insulin resistance is only one part of the picture. Genetics, ovarian function, sleep, activity, stress and other health factors may also contribute.
This is why a PCOS nutrition plan should address overall health rather than focus exclusively on carbohydrate intake or the number on the scale. 1
How Does the Keto Diet Work?
A ketogenic diet substantially restricts carbohydrates, increases the proportion of energy coming from fat and includes moderate amounts of protein. The exact proportions vary, but ketogenic diets typically involve very low carbohydrate intake, often around 20–50 grams per day. Individual requirements and dietary formulations can differ.
When carbohydrate availability becomes very low, the body begins producing ketones from fat for energy. This metabolic state is called ketosis.
Keto often excludes or sharply limits foods such as rice, wheat roti, bread, potatoes, most pulses in typical portions, many fruits and several other carbohydrate-containing foods.
A moderately lower-carbohydrate diet is different. It reduces some carbohydrate intake without necessarily aiming for ketosis or excluding entire food groups.
Reducing refined carbohydrates may be useful for some people, but eliminating nearly all carbohydrates is not a requirement for PCOS management.
What Does the Research Say About Keto and PCOS?
Research into ketogenic and very-low-carbohydrate diets in women with PCOS has reported potentially beneficial changes in some outcomes. Systematic reviews and meta-analyses have found improvements in certain metabolic and reproductive measures, but the studies vary in design, duration and quality. These limitations make it difficult to establish whether keto is superior to other sustainable dietary approaches or whether the reported benefits persist long term. 3 4
- Insulin resistance and blood sugar
- Some studies report improvements in measures of insulin resistance and fasting insulin following ketogenic dietary interventions. These findings are promising, particularly because metabolic health is an important consideration in PCOS.
- However, studies differ in duration, dietary composition and participant characteristics. An improvement in a short-term study does not establish that keto is superior to other sustainable dietary approaches over the long term. 2 3
2. Weight management
- Keto may help some people lose weight, partly because the diet can change appetite, food choices and overall energy intake. But weight loss is not guaranteed, and maintaining a highly restrictive diet can be difficult.
- Weight loss is not the only meaningful outcome in PCOS. Blood glucose, cholesterol, blood pressure, menstrual health, energy levels and quality of life also matter. Not every woman with PCOS needs to lose weight.
3. Menstrual cycles and androgen-related symptoms
- Some studies have reported changes in menstrual regularity or hormone-related measures following low-carbohydrate or ketogenic interventions. However, the evidence remains limited, and improvements in one measure do not necessarily translate into consistent improvements in ovulation, fertility, acne or excess facial hair.
- Keto should not be presented as a proven treatment for every hormonal symptom of PCOS. These symptoms may require specific medical treatment. 4 5
Do You Need to Stop Eating Rice, Roti or Millets?
No. Having PCOS does not mean you must eliminate rice, roti or other carbohydrate-containing foods.
The type of carbohydrate, portion size, overall meal composition and your individual health needs all matter. Foods such as whole grains, pulses, vegetables and whole fruits provide fibre and other nutrients that can support a balanced eating pattern.
For an Indian meal, consider these practical combinations:
- Rice with dal, vegetables and curd: combine carbohydrates with protein, fibre and other nutrients.
- Roti with chana, rajma or another pulse-based dish: include vegetables and a suitable protein source.
- Millets with sambar and vegetables: use millets as one option in a varied diet, rather than assuming they are automatically superior to every other grain.
- Fruit with nuts or plain curd: a practical snack that combines fruit with other nutrients.
You do not need to follow these combinations rigidly. Your portions and food choices should reflect appetite, activity, preferences, budget and medical needs.
The aim is to build balanced meals you can sustain—not to fear carbohydrates.
Is Keto Suitable for Everyone With PCOS?
Keto is not suitable for everyone, and having PCOS does not automatically make a ketogenic diet necessary or appropriate. Because it sharply restricts carbohydrates and changes the balance of foods you eat, it is worth considering both your medical history and your ability to meet your nutritional needs before starting.
Who should seek medical advice before trying keto?
Speak with your doctor or a registered dietitian before making a major change to your diet if you:
- Take medication for diabetes or high blood sugar. A substantial reduction in carbohydrate intake may change your blood glucose levels and medication requirements. Insulin and some other glucose-lowering medicines can increase the risk of hypoglycaemia. Never adjust or stop medication on your own.
- Take an SGLT2 inhibitor, a type of medicine used for diabetes and certain heart or kidney conditions. Combining these medicines with a ketogenic diet may increase the risk of diabetic ketoacidosis, sometimes even when blood glucose is not markedly elevated. Seek specific medical advice before considering keto.
- Are pregnant, breastfeeding or trying to conceive. Nutritional needs change during these stages, so restrictive diets should be discussed with your healthcare professional. If you are planning pregnancy, ask about an approach that supports adequate nutrition and preconception health.
- A ketogenic diet is not an established fertility treatment for PCOS. If you are trying to conceive, discuss a nutritionally adequate eating pattern with your healthcare professional rather than starting a restrictive diet in the hope of improving fertility.
- Have kidney, liver, pancreatic or other significant medical conditions, or a history of an eating disorder. Your nutritional requirements and the suitability of a restrictive eating pattern may differ.
What side effects should you watch for?
Some people experience headaches, fatigue, dizziness, constipation, nausea or reduced exercise tolerance when starting keto. Restricting many food groups can also make it harder to obtain enough fibre and a varied range of vitamins and minerals. Depending on food choices, LDL cholesterol—the type commonly called “bad” cholesterol—may rise in some people.
If you choose to try keto with appropriate guidance, discuss how to maintain nutritional adequacy and whether monitoring your blood glucose, lipid levels or other health measures is appropriate for you.
Stop and seek medical advice if you develop persistent or severe symptoms. If you have diabetes and experience vomiting, abdominal pain, rapid or difficult breathing, confusion or marked drowsiness, seek urgent medical care because these can be signs of diabetic ketoacidosis. Do not assume such symptoms are simply part of adapting to keto.
Does a stricter diet mean better PCOS outcomes?
No. A more restrictive diet is not automatically more effective. Keto can be difficult to sustain and may not suit your preferences, budget, cultural food habits or nutritional needs. If it leaves you feeling unwell, anxious about food or unable to eat flexibly, it may not be the right approach.
For many women with PCOS, a balanced eating pattern that includes vegetables, pulses, protein-rich foods, whole fruits and suitable portions of carbohydrate-containing foods can be a more practical long-term option. The aim is to support metabolic and overall health—not to follow the strictest possible diet.
Before starting keto, consider discussing your goals, medical history and medications with a qualified healthcare professional. You can manage PCOS without following a ketogenic diet, and diet should complement—not replace—appropriate medical care.
What Is a More Sustainable Approach to PCOS Nutrition?
For many women, a balanced eating pattern may be easier to maintain than strict keto. The 2023 International Evidence-based Guideline for PCOS recommends healthy eating and physical activity while recognising that no single dietary composition has demonstrated clear superiority for all health outcomes in PCOS. 1
A practical starting point is to:
- Include protein regularly, using foods such as dal, beans, curd, paneer, tofu, eggs, fish or chicken.
- Eat vegetables, pulses, whole fruits and other fibre-rich foods as part of a varied diet.
- Choose carbohydrate portions that suit your needs instead of automatically eliminating entire food groups.
- Combine nutrition with regular physical activity, adequate sleep and appropriate medical care.
- Monitor relevant health measures with your clinician rather than judging progress by weight alone.
If you have persistent irregular periods, symptoms of excess androgens or concerns about blood sugar, discuss appropriate assessment and treatment with your healthcare professional. Diet can be part of PCOS care, but it does not replace medical evaluation.
Key Takeaways
- Keto may improve some short-term metabolic measures in certain women with PCOS, but the evidence has important limitations.
- Keto is not the only dietary option, nor is it a mandatory treatment for insulin resistance.
- You do not need to eliminate rice, roti, millets or all carbohydrates to manage PCOS.
- A balanced, varied and sustainable eating pattern can support metabolic health.
- Menstrual symptoms, androgen-related concerns and metabolic risks may need individual medical assessment and treatment.
The bottom line: PCOS nutrition is not about finding the strictest diet. It is about choosing an eating pattern that supports your health, meets your nutritional needs and fits your life.
References
- Teede HJ, et al. Recommendations From the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. The Journal of Clinical Endocrinology & Metabolism.2023;108(10):2447–2469. Read the guideline
- Cannarella R, et al. Effects of ketogenic diets on polycystic ovary syndrome: a systematic review and meta-analysis.Reproductive Biology and Endocrinology. 2025;23:74. Read the research paper
- Arsenaki et al. The effects of ketogenic diet on polycystic ovary syndrome: A systematic review and meta-analysis.Clinical Nutrition. Published online 3 December 2025. Read the research paper
- Tosatti et al. Effects of the very low-carbohydrate ketogenic diet in women with PCOS: a systematic review with meta-analysis of clinical trials. British Journal of Nutrition. 2026. Read the research paper
- Yang J, et al. The impact of dietary interventions on polycystic ovary syndrome patients with a BMI ≥25 kg/m²: A systematic review and meta-analysis of randomized controlled trials. Reproductive Medicine and Biology.2024;23(1):e12607. Read the research paper