Eating Well for PCOS


Polycystic ovarian syndrome (PCOS) is a common hormonal disorder which affects up to 21% of women of reproductive age in Australia. PCOS is a syndrome that is characterized by three key features:

  • • Cysts that grow in the ovaries
  • • Abnormally high levels of male hormones, also called androgens and
  • • Irregular or absent periods


Two out of three of these features must be present for a diagnosis of PCOS to be made. These generally result in a vast array of symptoms including

  • • Skin changes, especially acne and darkening in areas
  • • Thinning hair
  • • Facial hair growth
  • • Weight gain and
  • • Difficulty falling pregnant.


PCOS is also commonly seen in alongside other health issues, such as anxiety, depression, sleep apnoea and insulin resistance. In fact, 50-70% of women with PCOS also have insulin resistance, which if left unchecked dramatically increases the risk of developing Type 2 diabetes.

We are unsure what exactly causes PCOS but there appears to be a large genetic component as it is often seen to run in families. Other factors that are thought to be possible contributing factors include insulin resistance, low vitamin D and inflammation in the body. Despite an unknown cause, there is a growing body of research that supports the role of lifestyle changes, such as nutrition, stress management and physical activity, in managing PCOS which is why working alongside an experienced dietitian is ideal.

Here are five of our top nutrition tips for improving your symptoms and achieving long term health with PCOS.


1/ Choose Low GI carbohydrates

Carbohydrates (a.k.a. carbs!) provide our bodies with energy in the form of sugar or glucose. When they are absorbed into our bloodstream, they cause a rise in glucose in the blood which is then delivered to our muscles for fuel to get us through the day. However not all carbohydrates are created equal.

High GI carbohydrates are broken into sugar quickly in the body causing a rapid rise in blood sugar levels and also insulin. On the other hand, low GI carbohydrates cause a low and slow gradual rise in blood sugar levels. This contributes to better blood glucose management, more stable insulin levels, and may also assist with weight management.

More recently, studies have identified that a lower GI diet can also lead to improved menstrual regularity, one of the most common symptoms associated with PCOS. Research has also shown that follow in women with PCOS, following a low GI can lead to modest weight loss and a 3-fold improvement in insulin sensitivity and therefore symptoms of PCOS.

Here are some simple low GI swaps:

      • Swap white jasmine rice for brown or basmati rice
      • Swap white bread for soy and linseed or sourdough bread
      • Swap white wraps for corn tortillas
      • Swap corn thins or rice cakes for ryvitas or vita-wheats
      • Swap cornflakes for rolled oats, natural muesli or all bran
      • Swap white potato for sweet potato


2. Aim to be YOUR healthiest weight

Weight loss is generally considered an important part of PCOS management, however, it can be incredibly frustrating and challenging for women with PCOS. Trying to achieve a normal or healthy BMI is simply unrealistic. The good news is that studies show even just losing 5% of body weight can help improve reproductive function and fertility, improve insulin resistance, reduce testosterone levels and improve problems with excess hair or acne. It can also significantly reduce the risk of developing chronic health issues such as Type 2 diabetes and cardiovascular disease.

Rather than looking for a quick fix for weight loss, opt for a lifestyle pattern that is going to be sustainable in the long run. Often small healthy changes that you can maintain long term far outweigh drastic changes that only last a week. For personalised advice that’s right for you, make an appointment with an Accredited Dietitian from the Eatsense team.


3. Boost your intake of omega 3 fatty acids

Omega 3 fatty acids are a type of fat which are most abundant in oily fish such as salmon, trout, tuna, mackerel and sardines. These healthy fats are commonly touted for their role in heart health and for easing achy joints, but research is showing us that omega three fats may also be an important dietary component in reducing the symptoms of PCOS.

They have the potential to improve insulin sensitivity, and may even reduce testosterone levels and help restore a regular menstrual cycle. Aim to include 2-3 serves of oily fish per week to achieve the recommended intake of omega three fats. Or if you don’t eat fish, choose a variety of plant sources of omega threes such as linseed, flaxseed oil, walnuts, chia seeds and hemp seeds. It can be difficult to achieve an adequate intake from these plant sources alone, so supplementing with a good quality omega three may be beneficial to assist in meeting these targets.

It is also wise to reduce your intake of saturated fats which are commonly found in meat fat, chicken skin, processed meats, full-fat dairy, coconut oil, butter, ghee, pastries, pies and takeaway foods,


4. Eat the rainbow

Fruits and veggies certainly give us bang for our buck when it comes to nutrient delivery. They are jam packed full of an abundance of essential vitamins, minerals, many of which also have the ability to act as antioxidants. Antioxidants are molecules that can prevent or slow damage to the body’s cells caused by unstable molecules called ‘free radicals’. This damage, known as oxidative stress is frequently seen alongside insulin resistance and carrying extra body weight – both of which are common in PCOS.

Choosing a diet high in a colourful selection of fruits and vegetables is the best way to boost your antioxidant levels. While antioxidants are available in supplement form, recent studies have found that their effectiveness is much less impressive than their wholefood counterparts.

To make sure you are getting enough of the good stuff, prioritise 3 to 4 different coloured veggies on your dinner plate each night, stock the fruit bowl with a variety of different fruits, or tick off the different colour groups as you go through the week (extra points if you get 5 different colours in one day!)


5. Follow a Mediterranean-Style diet

A Mediterranean-style diet is abundant in vegetables, fruits, legumes, wholegrains, nuts and seeds, with moderate amounts of poultry, eggs, dairy and extra-virgin olive oil and a limited intake of red meat and processed foods. This nutrient rich eating pattern provides plenty of fibre, vitamins, minerals, antioxidants and generally includes those low GI carbs discussed above.

The Mediterranean-style diet has numerous benefits for many of the body’s systems, but it may be particularly important for women with PCOS who are trying to conceive. A diet high in antioxidants from colourful fruit and veg, monounsaturated fats such as in olive oil, and omega three fats from fish can assist in reducing inflammation and promote the growth of healthy eggs ready for fertilization. A Mediterranean diet has also been shown to assist in the management of depression and anxiety, which is of particular interest due to the high cross over rates between PCOS and these mental health concerns.


If you have been diagnosed with PCOS and would benefit from the input of a specialised dietitian – click here to contact our team and make an appointment.

Nicole Saliba