Managing PMOS (PCOS) With Diet: What to Eat and What to Avoid
Woman eating a healthy meal for her PMOS (PCOS) diet, with vegetables spread on the kitchen counter.
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Key takeaways
- Understand the power of nutrition. Embrace a balanced diet to help manage polyendocrine metabolic ovarian syndrome (PMOS, formerly PCOS) symptoms. This can help improve insulin sensitivity and regulate hormone levels.
- Focus on whole foods. Prioritize fresh, unprocessed foods like fruits, vegetables, lean proteins, and whole grains to help manage PMOS symptoms effectively.
- Limit sugary and processed foods. Reduce your intake of sugary snacks, drinks, and refined carbohydrates to prevent blood sugar spikes and improve insulin sensitivity.
- Plan meals around activity. Eat your largest meals before times of high activity to help fuel your body and maintain energy levels. Consistent physical activity, like walking or running, also helps your body use insulin better and improve your overall health.
- Seek support for meal planning. Consider working with a dietitian to create a personalized PMOS meal plan that fits your lifestyle and helps reduce symptoms over time.
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Polyendocrine metabolic ovarian syndrome (PMOS), which used to be called polycystic ovary syndrome (PCOS), is a hormone disorder that can affect your reproductive system and appearance. People with this condition also are at increased risk of obesity, heart disease, and diabetes.
But a healthy diet, exercise, and restorative sleep can help reduce symptoms and manage the side effects of PMOS, says Shruthi Mahalingaiah, MD, MS, a Mass General Brigham reproductive endocrinologist/gynecologist.
“Health optimization in people with PMOS is sensitive to a lot of things—especially the things we eat and drink, our sleep-wake cycle, and physical activity,” she says. “Start with a balanced diet of whole, fresh foods as much as possible and limit ultra-processed foods. And put that diet into context of your circadian rhythms (your sleep-wake cycle). This means eating when you’re having the most activity, because that’s when your body needs the energy and can burn off excess blood sugar.”
This approach will help you control your blood glucose, which affects insulin and androgen levels. Ultimately, that can mean fewer PMOS symptoms and long-term health risks.
Why PCOS is now called PMOS
In May 2026, the official name for the medical condition PCOS changed to PMOS. Patient and professional organizations collaborated over several years to decide on a name that better represents how the condition affects different systems in the body, with the goal of improving diagnosis and treatment.
“Polycystic ovary” in the original name caused confusion for patients and health care providers, since you don’t need to have ovarian cysts to have PMOS. This played a role in some patients having a delayed diagnosis and less comprehensive care.
The new name doesn’t officially change how health care providers diagnose and treat PMOS, but Dr. Mahalingaiah notes it’s more accurate and may help improve how providers around the world approach care. For example, the word “metabolic” in PMOS reflects how it affects blood glucose and points to how you can help manage symptoms with changes to your diet.
Health effects of PMOS
Your body breaks down the food you eat into glucose (sugar). Most of that sugar gets released into your bloodstream (blood sugar). Blood sugar instructs your pancreas to release insulin, which helps your cells use blood sugar for energy.
Most people with PMOS have insulin resistance, which means the body doesn’t use insulin well. Over time, insulin resistance can lead to elevated blood sugar levels, weight gain, chronic inflammation, and diabetes. Insulin resistance can also lead to excess androgens (male sex hormones).
Insulin resistance and excess androgens can cause symptoms such as:
- Appearance: Excess hair growth or hair loss, acne, and weight gain
- Overall sense of well-being: Fatigue, low energy, anxiety, mood disorders like depression, and poor quality of life
- Reproductive health: Irregular menstrual periods, and infertility
Your doctor may prescribe contraceptive (birth control) medications or hormonal intrauterine devices (IUDs), fertility-enhancing medications, or diabetes medications to help manage PMOS symptoms. But Dr. Mahalingaiah emphasizes that you can also reduce the effects of PMOS with dietary choices.
Nutrition for PMOS management aims to control blood glucose, which can improve your body’s use of insulin and decrease androgen levels.
It helps to plan your meals at times when they can actually fuel your activity.
- Reproductive Endocrinologist/Gynecologist, Mass General Brigham
PMOS diet plan
Nutrition for PMOS is similar to nutrition for people with diabetes. The two most important factors are the types of foods you eat and the times of day you eat, Dr. Mahalingaiah says.
First, think about your food choices. Many people fall into a pattern where they eat starchy carbohydrates or sugars for a quick energy boost (or because they taste good). The sugar in those foods enters your bloodstream very quickly. Then your pancreas produces insulin to help your body process the glucose. People with PMOS who have insulin resistance are not able to process blood glucose effectively. As a result, the pancreas makes more and more insulin which can lead to high levels of insulin in your blood (hyperinsulinemia).
It’s important to manage this process so you don’t develop obesity and diabetes. Try to pair carbs and sugars with protein and fiber. This can slow the release of glucose into your bloodstream, which lessens the amount of insulin your body releases. A balanced diet can also help level out energy levels, reduce the symptoms of PMOS, and improve long-term health.
You should also think about when you need energy during the day, Dr. Mahalingaiah says. For example, many people tend to eat their heaviest meal at night, right before they go to sleep. Your blood glucose will rise, but it won’t get used to fuel activity.
The best diet for PMOS includes small healthy meals throughout the day. Dr. Mahalingaiah recommends eating your largest meals just before your more active times of day. For many people, this is right before you walk out the door to work or school. “It helps to plan your meals at times when they can actually fuel your activity,” she explains.
Finally, Dr. Mahalingaiah cautions against fad diets, intermittent fasting, and binge eating. She also usually doesn’t recommend weight-loss drugs or bariatric surgery as a first-line treatment. They may not help establish good habits and can ultimately lead to rebound weight gain.
Good foods for PMOS management
Dr. Mahalingaiah recommends whole, natural foods that fuel your body over longer periods of time and avoid spikes of glucose and energy.
Incorporate foods that contain more protein and fiber, which slow the release of glucose into the bloodstream:
- Green, leafy vegetables such as spinach, kale, and lettuce
- Foods rich in fiber, such as berries, whole grains, beans, and apples
- Fresh foods that have not been processed and are as close to whole as possible
- Lean proteins, such as beans, legumes, nuts, and fish
- Non-starchy vegetables such as peppers, broccoli, cauliflower, mushrooms, snow peas, and celery
- Whole grains, such as whole grain breads and pastas, brown rice, and barley
Sporty African American woman eating an Apple outdoors, after exercise.
Foods to avoid with PMOS
Try to limit foods that tend to spike blood glucose, such as packaged, processed foods like chips. If you can’t read or recognize the ingredients on a food label, that food is highly processed.
Other foods to limit in high quantities include:
- Foods with refined flour, such as white bread, pizza crust, and pasta
- Fried foods
- Red meat and processed lunch meats
- Saturated fats such as butter and margarine
- Sugary drinks such as sodas, teas, and sports drinks
- Sugary snacks, such as candies, cookies, and cakes
- White rice
An assortment of unhealthy food spread out on a surface, from a top view.
Other lifestyle changes for PMOS symptoms
Dr. Mahalingaiah emphasizes that you don’t need to focus on calorie-counting or getting every meal perfectly right. Small changes that you can maintain may help with PMOS symptoms over time.
Combining other lifestyle changes along with your diet may also help, such as:
- Improve sleep hygiene. Getting a good night’s rest is important for anyone, and people with PMOS are more likely to have trouble sleeping than people without the condition. Talk to your provider if you’re having sleep problems. Small changes may help you sleep better, like avoiding alcohol and screen time before bed, as this disrupts your sleep cycle.
- Get regular exercise. Physical activity like brisk walking or running helps your body use insulin better, and it may help regulate your period. Consider walking even for a short time after a meal to help burn off excess sugars. Consistent exercise also helps your mental health and can give you more energy to take care of your body.
- Practice stress management. Navigating a condition like PMOS on top of everyday life can create extra stress, which can make it harder to eat well and meal prep for yourself. Practice stress management techniques like breathing exercises, meditation, or yoga, and talk to your provider if you’re feeling overwhelmed.
Finding your PMOS meal plan
Dr. Mahalingaiah recommends working with a dietitian to help make small, sustainable changes to establish a PMOS meal plan. Over time, those changes will help you control blood glucose, insulin, and androgens—reducing PMOS symptoms and the risk of chronic conditions.
Learn about 10 food substitutions for healthier eating
/content/unified-xwalk/en/health-wellness/simple-substitutes-for-healthy-eating
Mass General Brigham offers specialized care for people with polyendocrine metabolic ovarian syndrome (PMOS).
Infertility and Reproductive Surgery Program
Metabolic Endocrinology and Weight Loss Program
Reproductive Endocrinology Program
Weight Management and Wellness
Contact Obstetrics and Gynecology
Contact an obstetrics and gynecology location or specialist to learn about your care options. With locations throughout New England and support for patients traveling from outside the United States, we make it easier to access coordinated, expert care.
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