PCOS & Nutrition: Can Diet Really Help?

If you've been diagnosed with polycystic ovary syndrome (PCOS), you've probably come across a huge amount of conflicting advice about what you should and shouldn’t eat.

From cutting out carbohydrates to avoiding dairy or following restrictive diets, it can be difficult to know what actually works.

The truth is that nutrition can play an important role in managing PCOS—but there is no single “PCOS diet” that works for everyone.

A personalised, evidence-based approach is usually the most effective way to support your symptoms and long-term health.

What is PCOS?

Polycystic ovary syndrome (PCOS) is one of the most common hormonal conditions affecting women of reproductive age, affecting around 1 in 10 women in the UK.

Symptoms can vary widely but may include:

• Irregular or absent periods

• Acne

• Excess facial or body hair

• Difficulty losing weight

• Fertility challenges

• Polycystic ovaries seen on ultrasound

Not everyone experiences all symptoms, and PCOS can affect women differently throughout life.

A note on the name

Although the condition is called polycystic ovary syndrome (PCOS), the name can be misleading. Not all women with PCOS have polycystic ovaries, and the condition involves much more than the ovaries themselves.

Because of this, there has been international discussion about whether the name should be updated in the future to better reflect its hormonal and metabolic nature. However, PCOS remains the current medical term used in clinical practice and guidelines.

How can nutrition help?

While nutrition cannot cure PCOS, it can significantly help manage symptoms and support long-term health.

For many women, dietary and lifestyle changes may improve insulin sensitivity, support weight management (if appropriate), help regulate menstrual cycles, and reduce the risk of long-term conditions such as type 2 diabetes and cardiovascular disease.

The goal is not perfection or restriction—it is sustainable habits that support your individual health.

Understanding insulin resistance

Many women with PCOS have some degree of insulin resistance, meaning the body’s cells do not respond as effectively to insulin. As a result, the body produces higher levels of insulin to maintain normal blood sugar levels.

Higher insulin levels can stimulate the ovaries to produce more androgens (male-type hormones), which may contribute to symptoms such as irregular periods, acne and excess hair growth.

This is one of the key reasons why nutrition and lifestyle can play an important role in PCOS management.

Is there a “best” diet for PCOS?

Despite what is often seen online, there is no single best diet for everyone with PCOS.

Current evidence supports a balanced, sustainable dietary pattern such as:

• Plenty of vegetables and fruit

• High-fibre carbohydrates (wholegrains, beans, lentils)

• Lean sources of protein

• Healthy fats such as olive oil, nuts and oily fish

For some women, modest weight loss may improve insulin sensitivity and symptoms. However, weight is not the focus or problem for everyone with PCOS, and care should always be individualised.

Should you cut out carbohydrates?

Carbohydrates are often unfairly blamed for PCOS symptoms.

In reality, they are an important source of energy and nutrients. The focus should be on choosing higher-fibre, minimally processed carbohydrates such as oats, wholegrains, legumes and vegetables.

Completely eliminating carbohydrates is not necessary for most women and is rarely sustainable long term.

Lifestyle factors also matter

Nutrition is only one part of the picture.

Regular movement, strength training, sleep quality and stress management all play important roles in supporting hormonal and metabolic health in PCOS.

The bottom line

PCOS is a complex condition, and it is understandable to feel overwhelmed by the amount of conflicting information available.

Rather than focusing on restrictive diets or quick fixes, a balanced, evidence-based and individualised approach is most likely to support long-term health and wellbeing.

If you have PCOS and would like personalised nutritional support, I offer consultations designed to help you build a realistic and sustainable approach that fits your lifestyle and health goals.