If you have recently heard the term PMOS, you may be wondering what it means, particularly if have been previously diagnosed with PCOS. Polyendocrine Metabolic Ovarian Syndrome (PMOS) is the new name for the condition previously known as Polycystic Ovary Syndrome (PCOS). The terminology changed in 2026 to better represent the hormonal, metabolic and reproductive features of the condition.

PMOS symptoms can present very differently in people. Some experience irregular periods, acne or excess hair growth, while others may struggle with fertility, insulin resistance, weight management or low energy. Because symptoms and metabolic health vary considerably from person to person, it is important for nutrition support to be individualised.

There is no single PMOS diet that applies to everyone. Instead PMOS nutrition should focus on building sustainable eating habits that support blood glucose regulation, cardiovascular health, nutritional adequacy along with the individual symptoms and their health goals.

Working with a specialised PMOS dietitian can also help you identify which dietary changes are genuinely useful, rather than unnecessarily restricting foods based on conflicting information online.

PMOS (formerly PCOS)

What Does PMOS Mean?

PMOS stands for Polyendocrine Metabolic Ovarian Syndrome. The condition was previously called Polycystic Ovary Syndrome (PCOS). Following an extensive international consensus process involving healthcare professionals, researchers and people living with the condition, PMOS became the new name in May 2026.

The change recognises that the condition involves much more than the ovaries. Hormonal regulation, metabolism, insulin signalling and reproductive health can all be affected. PMOS is common, affecting approximately one in eight women, or more than 170 million women globally, although its presentation varies considerably between individuals.

Is PMOS the Same as PCOS?

Yes, PMOS is the new name for the condition previously called PCOS. The name change does not mean that everyone previously diagnosed with PCOS needs to be diagnosed again. Current international guidance confirms that existing evidence-based recommendations continue to apply. You may therefore continue to see both terms, particularly in older research, healthcare information and online searches for PCOS nutrition.

Common Symptoms of PMOS

Not everybody with PMOS will experience all of these symptoms, and their severity can change throughout life.

How Can Nutrition Support PMOS?

Why Nutrition Matters

Nutrition cannot “cure” PMOS, but it can form an important part of its long-term management. PMOS is associated with an increased risk of metabolic conditions including impaired glucose regulation and type 2 diabetes. Dietary habits can therefore be particularly relevant for supporting blood glucose, lipid levels, cardiovascular health and overall nutritional status.

Research examining dietary interventions in PMOS/PCOS has found improvements in outcomes including insulin sensitivity, body composition and some hormonal and reproductive markers. However, this does not mean everyone with PMOS needs to lose weight or follow a restrictive diet. Healthy eating and physical activity can provide metabolic and general health benefits even without weight loss.

Why There Isn’t One Specific “PMOS Diet”

There is currently no evidence that one particular dietary composition is superior to all others for metabolic, hormonal, reproductive, psychological or weight-related outcomes.

Low-carbohydrate, low-GI, Mediterranean-style and DASH-style diets have all been researched. Some studies have found benefits from particular approaches, but the evidence is not strong enough to recommend one universal diet for everybody with PMOS. The best PMOS diet is therefore usually one that is nutritionally balanced, supports your individual health needs and, importantly, can be maintained long term.

The Importance of Personalised Nutrition

Two people with PMOS may have very different nutritional priorities. For example, one person may need support with insulin resistance and elevated cholesterol, while another may have a healthy weight and metabolic profile but struggle with fertility or irregular periods.

A PMOS registered dietitian should consider your medical history, symptoms, blood results, medications, lifestyle, relationship with food and personal preferences before recommending dietary changes.

Building a Balanced Diet With PMOS

Rather than focusing on foods you need to eliminate, it can be more helpful to consider what your diet needs more of.

Getting Enough Protein

Including protein regularly throughout the day can help make meals satisfying and supports the maintenance and development of muscle mass.

Useful sources include fish, chicken and turkey, eggs, dairy such as Greek yoghurt, Skyr and cottage cheese, tofu & tempeh, beans, lentils and chickpeas, as well as lean meats, nuts and seeds.

Pairing protein with carbohydrate-containing meals may also help create a more balanced meal and reduce large fluctuations in post-meal blood glucose.

Choosing High-Fibre Carbohydrates

Having PMOS does not mean you need to stop eating carbohydrates. Instead, focus predominantly on fibre-rich carbohydrate sources such as: Brown or basmati rice, quinoa, wholegrain pasta, oats, wholegrain bread, beans and lentils, potatoes and sweet potatoes with skin, fruits and vegetables.

A regular fibre intake supports digestive and cardiovascular health and can also help with satiety and blood glucose management.

Including Healthy Fats

Unsaturated fats are an important component of a balanced diet. Good sources include extra virgin olive oil, avocado, nuts, seeds and oily fish such as salmon, sardines, trout and mackerel. Replacing foods high in saturated fat with unsaturated fats can also support cardiovascular health, particularly important when considering the longer-term metabolic risks associated with PMOS.

Eating a Variety of Fruit and Vegetables

Aim to include a range of colours across the week. Fruit and vegetables provide fibre alongside vitamins, minerals and beneficial plant compounds. You do not need to avoid fruit because it contains naturally occurring sugar. Whole fruit also provides fibre and water, making it very different nutritionally from foods containing large amounts of added or free sugars.

PMOS and Blood Sugar Management

Understanding Blood Sugar and PMOS

Insulin resistance is an important underlying feature that impacts between 35 to 80% of people with PMOS. Insulin helps glucose move from the bloodstream into cells, where it can be used for energy. When cells become less responsive to insulin, the body may compensate by producing more.

Over time, impaired glucose regulation can increase the risk of prediabetes and type 2 diabetes. Guidance recommends assessment of glycaemic status at the time of PMOS diagnosis and for periodic reassessment according to the individual’s diabetes risk.

Building Balanced Meals

You do not need to eliminate carbohydrates to support blood glucose. Instead, try constructing meals around:

Protein + high-fibre carbohydrate + vegetables/fruit + healthy fat.

For example:
Greek yoghurt + oats + berries + chia seeds

Or chicken + brown rice + roasted vegetables + olive oil dressing

Or lentil curry + edamame beans + basmati rice + spinach

Combining nutrients in this way can create filling, nutritionally balanced meals while providing a slower and more sustained source of energy.

Practical Ways to Support Stable Energy Levels

Here are some of our top tips to support stable energy levels:

• Eating regular meals rather than routinely going very long periods without food
• Including protein at meals
• Choosing higher-fibre carbohydrates regularly
• Pairing carbohydrate foods with protein or healthy fats
• Including vegetables or fruit throughout the day
• Limiting excessive sugary drinks
• Remaining physically active

These strategies are more realistic than trying to completely avoid carbohydrates or sugar.

Weight Management and PMOS

Why Weight Management Can Be Challenging

Weight is influenced by many factors, including genetics, appetite regulation, sleep, physical activity, environment and medications. Metabolic and hormonal differences associated with PMOS can add another layer of complexity.

Importantly, having PMOS does not mean weight gain is inevitable or that weight loss is impossible. Structured lifestyle and weight-management interventions can still be effective for people with PMOS.

Sustainable Approaches to Weight Management

For someone living at a higher weight who wants to lose weight, a modest and individualised energy deficit may be appropriate. Rather than pursuing rapid weight loss, dietary strategies should focus on habits such as increasing vegetables and fibre, consuming adequate protein, reducing energy-dense foods where appropriate and becoming more physically active.

For people who do not need or want to lose weight, nutrition can instead focus on metabolic health, nutritional adequacy and preventing unwanted weight gain.

Moving Away From Restrictive Diets

Highly restrictive diets can be difficult to maintain and may create unnecessary anxiety around food. There is no requirement for everyone with PMOS to become gluten-free, dairy-free, sugar-free or even to follow a low-carbohydrate diet. Unless there is another medical indication for excluding a food, the focus should usually be on overall dietary quality rather than individual foods being labelled as “good” or “bad”.

Important Nutrients to Consider With PMOS

Vitamin D

Vitamin D deficiency is relatively common in the general population and has also been reported among 67-85% of people with PMOS.

Vitamin D contributes to bone, muscle and immune health. In the UK, vitamin D supplementation is recommended for the general population during autumn and winter because sunlight is insufficient for adequate skin synthesis. Higher-dose supplementation should be guided by blood results along with advice from an appropriate healthcare professional.

Calcium

Calcium is important for bone health, muscle contraction and nerve function. Sources include milk, yoghurt, cheese, calcium-fortified plant alternatives, calcium-set tofu, sardines with edible bones and some green vegetables like kale and bok choi. Dairy products should not routinely need to be eliminated because of PMOS, but rather, reducing dairy can be looked at on a case by case basis if deemed necessary.

Iron

People experiencing heavy or prolonged menstrual bleeding may be at increased risk of iron deficiency. Best sources include meat, fish, eggs, with vegetarian sources including beans, lentils, tofu, fortified cereals, nuts and seeds. If you are experiencing significant tiredness alongside heavy periods, speak to your GP about whether blood testing for iron deficiency may be appropriate.

B Vitamins

B vitamins contribute to normal energy metabolism and several other important functions. A varied diet containing wholegrains, dairy or fortified alternatives, eggs, meat, fish, legumes and vegetables will usually provide a range of B vitamins.

Vitamin B12 deserves particular attention in people following vegan diets and may also warrant monitoring in some people taking metformin long term.

Omega-3 Fatty Acids

Omega-3 fats are found predominantly in oily fish such as salmon, sardines, mackerel and trout. These essential fatty acids contribute to cardiovascular health, and research has investigated whether omega-3 supplementation can influence lipid and metabolic markers in PMOS. Results are promising in some areas but are not strong enough to suggest that everyone with PMOS requires an omega-3 supplement. Including a serving of oily fish 1-2 x a week is a useful food-first approach.

When Might Supplements Be Appropriate?

Supplements should ideally address an identified need rather than being taken simply because a product is marketed for PMOS. They may be appropriate when dietary intake is inadequate, blood tests identify a deficiency, pregnancy is being planned or another clinical indication exists.

Some supplements marketed specifically for PMOS have limited or inconsistent evidence. Speaking to a PMOS specialist dietitian can help determine whether supplementation is appropriate alongside any medications you take.

Is There a Specific PMOS Diet?

Foods to Include

A balanced PMOS nutrition plan could regularly include:

• Fruits and vegetables
• Wholegrains
• Beans and lentils
• Fish
• Lean proteins
• Yoghurt or fortified alternatives
• Nuts and seeds
• Olive oil

This resembles Mediterranean-style healthy eating, although you do not need to follow a rigid Mediterranean diet.

Foods You Don’t Necessarily Need to Avoid

There is no universal requirement to remove: gluten, dairy, carbohydrates, fruit or all foods containing sugar.

Removing multiple food groups without a clinical reason can make meeting nutritional requirements more difficult and may unnecessarily complicate eating.

Common PMOS Diet Trends to Be Cautious Of

Very-low-carbohydrate and ketogenic diets, intermittent fasting and highly restrictive “hormone-balancing” diets are frequently promoted online. Some approaches have been studied and may produce improvements in certain outcomes, particularly when they result in an energy deficit or improvements in overall diet quality.

However, this does not make them necessary – or appropriate for everyone. The international guideline specifically recommends avoiding unnecessarily restrictive and nutritionally unbalanced diets and instead choosing sustainable approaches based on individual preferences.

PMOS, Exercise, and Lifestyle

Nutrition is only one part of PMOS management.

Physical Activity and Movement

Regular movement can improve metabolic health and cardiovascular fitness and support weight management. Both structured exercise and everyday movement count. Walking, cycling, swimming, dancing or participating in sports can all contribute towards your overall activity.

Strength Training

Resistance training is particularly useful for maintaining and building muscle. Muscle is metabolically active tissue and plays an important role in glucose metabolism. Systematic review evidence suggests resistance exercise can improve androgen levels and body composition in people with PMOS, while aerobic exercise can improve several metabolic markers.

A combination of resistance and aerobic activity can therefore be useful.

Sleep and Recovery

Sleep is sometimes overlooked when discussing nutrition for PMOS. Poor sleep can affect appetite, food choices, energy and glucose regulation. PMOS is also associated with an increased prevalence of obstructive sleep apnoea. If you regularly experience loud snoring, significant daytime sleepiness or un-refreshing sleep, discuss this with your healthcare team.

Stress Management

PMOS can have a considerable psychological impact. Anxiety, depression, body-image concerns and stress surrounding fertility or weight can all affect wellbeing and eating behaviours. Nutrition advice should therefore support your overall health without making food another source of stress.

When Should You Speak to a Dietitian About PMOS?

Struggling With Weight Management

If you have repeatedly tried restrictive diets or feel unsure why your weight is changing, a PMOS dietitian can help you develop a more structured and sustainable approach.

Unsure What to Eat

Conflicting information online can make PMOS nutrition unnecessarily confusing. You may have been told to stop eating carbohydrates, remove dairy, avoid gluten or follow intermittent fasting. A dietitian can help distinguish evidence-based recommendations from nutrition myths.

Managing Multiple Symptoms or Health Concerns

Nutrition advice becomes particularly valuable when PMOS occurs alongside conditions such as prediabetes, type 2 diabetes, high cholesterol, IBS, food intolerances or fertility concerns. Your nutrition plan needs to consider your whole health picture, rather than treating PMOS in isolation.

Looking for Personalised Nutrition Advice

Generic meal plans cannot account for your symptoms, preferences, work schedule, cultural foods, cooking ability, medical history or relationship with food, but having personalised, 1-1 dietetic support can.

How Can a Dietitian Help With PMOS?

Assessing Your Current Diet

A dietitian can review what you currently eat, your meal pattern, lifestyle and symptoms before recommending changes.

Identifying Nutritional Gaps

Your assessment may identify inadequate protein, fibre, healthy fats, micronutrients or overall energy intake.

Creating Balanced and Practical Meals

Rather than giving you a long list of foods to avoid, a dietitian can help adapt the foods you already enjoy into balanced meals.

Setting Realistic Nutrition Goals

Changing everything at once is rarely necessary. Small, specific goals – such as adding protein to breakfast or increasing fibre gradually – may be much easier to maintain.

Supporting Sustainable Changes

Long-term health depends much more on what you can consistently do than what you can follow perfectly for two weeks. A PCOS dietitian or PMOS dietitian can help develop strategies that work around your real lifestyle.

Reviewing and Adapting Your Nutrition Plan

Your nutritional requirements and priorities may change over time. Follow-up appointments allow your dietitian to review symptoms, progress, blood results and challenges and adapt your plan accordingly.

Frequently Asked Questions About PMOS and Nutrition

What Is PMOS?

PMOS stands for Polyendocrine Metabolic Ovarian Syndrome. It is a hormonal and metabolic condition that can affect menstrual cycles, fertility, skin, hair growth, metabolic health and psychological wellbeing.

Is PMOS the Same as PCOS?

Yes. PMOS is the new name for Polycystic Ovary Syndrome (PCOS). The name was officially changed in 2026 to better reflect the broader endocrine and metabolic nature of the condition.

Can Nutrition Help With PMOS?

Yes. Nutrition can support metabolic and cardiovascular health, blood glucose regulation, nutritional adequacy and weight management where appropriate. Nutrition should form part of a wider individualised management plan rather than being viewed as a cure.

Is There a Specific PMOS Diet?

No. Current international guidance does not recommend one particular dietary composition above all others.

What Foods Should I Eat With PMOS?

Prioritise a varied diet containing vegetables, fruit, high-fibre carbohydrates, protein foods, beans and pulses, nuts, seeds and unsaturated fats. The exact balance should be personalised to your requirements.

Can PMOS Make It Difficult to Lose Weight?

Weight management can be challenging for some people with PMOS, but weight loss is still possible where it is clinically appropriate and desired. Structured lifestyle interventions can be effective, and nutrition support should avoid weight stigma or unrealistic expectations.

Should I Take Supplements for PMOS?

Not necessarily. Supplements should ideally be recommended according to your dietary intake, blood results, medications, pregnancy plans and individual requirements rather than simply because you have PMOS.

Can a Dietitian Help With PMOS?

Yes. A registered dietitian can assess your diet, symptoms, medical history and lifestyle and translate the evidence around PMOS nutrition into realistic changes that fit your individual circumstances.

Can I See a PMOS Dietitian Online?

Yes. Online consultations can provide the same opportunity to discuss your symptoms, eating habits, health goals and challenges without needing to travel to a clinic.

Take the Next Step With Personalised Nutrition Support

PMOS is a complex condition, which is why nutrition advice should never be one-size-fits-all. There is no perfect PMOS diet, and you do not need to eliminate multiple food groups or follow an extremely restrictive eating plan to look after your health.

Instead, evidence supports focusing on sustainable healthy eating, regular physical activity and lifestyle changes personalised to your symptoms, metabolic health, preferences and goals. Working with a specialist PMOS dietitian can help you understand what your body actually needs and create a practical nutrition strategy that fits into your life.

Ready for personalised support with PMOS nutrition? Book an appointment with one of our registered dietitians to receive evidence-based nutrition advice tailored to your symptoms, health and lifestyle. Book Your Free Discovery Call to discuss how we may be able to support you.