What should I eat to treat PCOS?

Accredited Practising Dietitians, The Biting Truth, dish up nutritional tips to help you better control your blood glucose levels, improve your sensitivity to insulin and manage Poly-cystic Ovarian Syndrome (PCOS).


In a new collaboration with Dietitians Association Australia, Eat Right provides expert nutrition and diet advice on a range of niche’ exercise and health condition topics.


What is PCOS?


1 in every 8 women of childbearing age is affected

1 in every 8 women of childbearing age is affected by PCOS.

Poly-cystic Ovarian Syndrome (or PCOS) is one of the most common medical conditions in young women. In fact, 1 in every 8 women of childbearing age is affected and unfortunately, many cases remain undiagnosed. In a nutshell, PCOS involves an imbalance of one or both of the following hormones:

  • Testosterone (the male sex hormone) is higher than it should be
  • Insulin (the hormone that helps to store energy after we eat carbohydrates) is higher than it should be.


What are the symptoms?


Women may experience some (not necessarily all) of the following symptoms:

  • Lack of or irregular periods
  • Struggling to fall pregnant
  • Loss of hair from the head
  • Excess growth of body hair
  • Acne
  • Deterioration of mental health
  • Difficulty in losing weight


Insulin Resistance


At least two-thirds of women with PCOS also have insulin resistance, hyperinsulinemia and metabolic dysfunction. These characteristics are very similar to those experienced in Type-2 Diabetes and so the mechanisms to treat and manage the two often overlap. But what exactly is insulin resistance and what can be done about it?

Consider this scenario…



The right diet and exercise can help you better control your blood glucose levels, improve your sensitivity to insulin and manage PCOS.

You are the manager of a small business that employs five staff members. Your workers are given set workloads and their daily performance is outstanding. You decide to give your workers greater workloads because you want to get the most out of them, as any good business manager would. Your workers accept the challenge and continue to work as quickly and efficiently as they can. However, work begins piling up on their desks and the workers are starting to tire. You now must make the following business decision: Do you (a) employ new workers to keep on top of this greater workload? Or, do you (b) dial it back and inform your clients that deadlines will have to be extended?

You’d pick (a) right? I mean who wouldn’t take the opportunity to grow their small business and employ more staff if the work is flowing in? But what if this small business is your body? The workers are your insulin and the workload is glucose (blood sugar). Picking option (a) would mean that you need a larger office to accommodate the larger number of workers. Would you choose to increase the size of your body just so you can accept a greater workload? No! If this small business is your body and the workload is incoming glucose, you would most certainly pick (b) – you’d dial that workload right back and restore the efficiency of the workers you already have.

In PCOS, your body IS this small business and your insulin is less able to do its job of removing glucose from the blood. If the amount of glucose coming into your body is not being controlled, then you will produce more insulin in attempt to overcome this inefficiency. High concentrations of insulin are thought to stimulate androgen production (e.g. testosterone) and exacerbate many of the associated features and side-effects of PCOS.  Insulin is also a storage hormone, and having excess amounts floating around means that excess energy from the food we eat will be stored as fat. Over time, this can lead to unwanted weight gain and an increased risk of developing diabetes and/or heart disease. Therefore, it is of great importance that women with PCOS control the amount of glucose going in to their bodies and improve their insulin sensitivity.


Eat Right’s Top 3 Healthy Eating Tips


Here are 3 of the most important nutritional tips to help you better control your blood glucose levels, improve your sensitivity to insulin and manage PCOS.

1. Reduce your sugar intake.

Now we are not advocating that you clear your house of anything and everything that contains sugar! However, in light of what we have discussed, it is important that you be mindful how much sugar is coming in through your diet to minimise the workload of your insulin. The World Health Organisation (WHO) recommends that adults reduce their added sugar intake to less than 6 teaspoons a day (~25 grams) for optimal health outcomes. To put this into perspective, 1 tablespoon of tomato sauce can have around 1 teaspoon (4 grams) of added sugars, while a single soft drink can have around 10 teaspoons (40 grams)! Choose whole foods that are minimally processed, such as fresh fruit and vegetables, nuts and seeds, fish, milk, cheese, yoghurt and lean meats. When purchasing packaged foods, flip over to the Nutrition Information Panel and choose products that have less than 15g sugar per 100g. It’s also a good idea to check the Ingredients List to see if sugar has been added to the product. A lot of the times it will be, even when you don’t expect it! Click here for extra help with reading food labels.


2. Choose quality over quantity.

Carbohydrates are important when the goal is to stablise the amount of glucose released into the blood. It is important to choose carbohydrates that are high in fibre, low GI and packed full of nutrients! These might include green leafy and cruciferous vegetables (spinach, kale, cauliflower, green beans, Brussels sprouts), pumpkin, sweet potato, wholegrains, legumes, brown rice and oats. Aiming for 5 serves of vegetables and 2 serves of fruit everyday is a great challenge to ensure that you’re getting in plenty of nutrient dense carbohydrates. Another great tip is to fill HALF your plate with non-starchy vegetables at dinner time. Try to avoid white varieties of breads and cereals that are high GI and tend to release glucose into the blood are lot more rapidly!’


3. Choose healthy fats.

Adding high quality fat to your meal can actually aid digestion and slow the release of glucose from carbohydrates into your body – the common theme here! Include fats in your diet from whole, unprocessed foods such as avocados, oily fish (mackerel, salmon, tuna), eggs, raw unsalted nuts, nut butters and olive oil. When purchasing fats and oils, check the label and avoid products that have been “refined” or “hydrogenated” as this tends to mean that trans fats are present.


And last but not least… Exercise!


Exercise is key to a healthy lifestyle and PCOS management as it can improve your muscles’ sensitivity to the hormone insulin. Click here to find out how to Exercise Right for PCOS. Increasing your total muscle mass will mean that your body has an increased capacity to remove glucose from the blood. You should aim to do around 20-40 minutes every day of activity.  Remember – physical activity is not just running on a treadmill or pumping weights at the gym, but can include a variety of activities like dancing, swimming, walking your dog and carrying your heaving shopping bags around too (there’s another excuse to go shopping if you needed one)!


So now you should be sitting up a little taller and feeling a little more positive about what you can do when it comes to PCOS lifestyle management. The strategies provided are a broad guide to get you started, and we strongly recommend that you visit a qualified Accredited Practising Dietitian (APD) if you are seeking more tailored, individual advice.



Thanks to current interns at The Biting Truth Melissa Meir and Jessica Turton for their help with researching this article. Both are studying their Masters in Nutrition and Dietetics at The University of Sydney.