Diet won’t fix PCOS, but it can meaningfully affect how your body responds to it. Managing PCOS through diet starts with eating low glycemic index foods to help support steadier blood sugar and insulin levels. Clinical research suggests that women with PCOS who follow a low-glycemic-index diet may experience more ovulatory cycles compared to those on a normal-GI diet, likely because of the effect on insulin sensitivity and reduced androgen levels. By prioritizing lean proteins, high fiber vegetables, and healthy fats, women may naturally help support more balanced hormone levels over time.
Key Takeaways for Managing PCOS
- Diet plays an important role in managing PCOS because it directly affects insulin resistance, hormone balance, and ovulation patterns.
- A low glycemic index diet may help improve insulin sensitivity and support more regular ovulation in women with PCOS.
- Many women with PCOS have a higher BMI, but the condition can also occur in women with normal or low body weight, often referred to as lean PCOS.
- Choosing whole foods such as lean proteins, fiber-rich vegetables, healthy fats, and complex carbohydrates may help regulate blood sugar and support hormonal balance.
- Reducing refined carbohydrates, added sugars, processed foods, and excess caffeine may help decrease inflammation and improve PCOS symptoms.
- Lifestyle habits such as regular exercise, good sleep, stress management, and maintaining a healthy BMI can further improve fertility and PCOS symptoms.
- Tracking your cycle, symptoms, diet, and lifestyle patterns over time can help you better understand how your body responds and support your fertility journey.
It’s certainly not breaking news that diet plays a huge role in impacting overall health. For women, what we eat has a significant impact on hormones and reproductive health.
This is especially true for women with polycystic ovarian syndrome (PCOS). Since PCOS is driven by a hormonal imbalance and often associated with insulin resistance, a nourishing diet can have a positive impact on reducing symptoms as well as optimizing fertility.
Key terms explained
- Insulin resistance is a metabolic state where the body’s cells do not respond effectively to insulin, leading to higher blood sugar and increased fat storage.
- Androgens are male-dominant hormones that, when elevated in women with PCOS, can contribute to acne, unwanted hair growth, and irregular ovulation.
- Glycemic index (GI) is a ranking system for carbohydrates based on how quickly they raise blood glucose levels.
- Myo-inositol is a naturally occurring, vitamin-like compound that may support insulin sensitivity and egg quality in women with PCOS.
How PCOS is affected by diet
Altering diet can not only make you feel better, but can improve various symptoms of PCOS, insulin sensitivity, hormone regulation, and fertility!
Women with PCOS often experience insulin resistance, meaning the body cannot efficiently regulate blood sugar levels. This inefficiency leads to increased levels of insulin within the body in an attempt to achieve blood sugar regulation following meals, ultimately storing more fat and leading to weight gain.
In addition to weight gain, high levels of insulin can also contribute to higher levels of male hormones, or androgens. The imbalance of male and female-dominant hormones can alter reproductive hormonal cycling which may lead to irregular ovulation and issues with menstrual cycles.
Studies show that many women with PCOS have a higher body mass index, with about 38% to 88% being overweight or obese. A higher BMI is often associated with insulin resistance and more pronounced hormonal symptoms. However, PCOS is not limited to women with excess weight. Research also shows that about 20% to 50% of women with PCOS have a normal or low BMI, a condition commonly referred to as lean PCOS.
Diet to improve PCOS symptoms, fertility, and treatment success
Every woman is different and no one dietary strategy works for everyone – but choosing low glycemic index foods has been shown to improve fertility and decrease insulin resistance in women with PCOS. The digestive system breaks down these foods more slowly which allows for a gradual release of insulin which keeps you feeling full longer.
Include some of the following in your rotation of meals:
- Lean proteins including fish, turkey, and chicken
- Omega-3 fats such as salmon, tuna, trout, tofu, walnuts, flaxseed, and chia seeds
- Complex carbohydrates like whole grains, sweet potatoes, beans, lentils, and chickpeas. High-fiber vegetables such as broccoli, avocados, red/green peppers, Brussels sprouts, and cauliflower
- Anti-inflammatory foods like kale, spinach, tomatoes, almonds, and walnuts
- Increase antioxidants with the use of fresh herbs and spices while making food taste incredible
What foods should I avoid with PCOS?
Refined carbohydrates can cause inflammation and exacerbate insulin resistance, so opt for complex carbohydrates instead! If you are someone who can’t get your day started without caffeine – like most of us –, swap your current caffeine source for green tea – it has been shown to assist with weight loss and decreases BMI (body mass index), insulin resistance, and testosterone levels in women with PCOS.
Ditch those sodas and infuse your water with fresh fruits and a squeeze of lemon to stay hydrated as much as possible. If you’re missing the carbonation, sparkling water may satisfy that craving – there are many options to experiment with and still prioritize your health.
Remember, altering your diet doesn’t have to be restrictive and miserable. If your breakfast normally includes toasted white bread with butter, try swapping for whole-grain wheat toast topped with smashed avocado and everything-but-the-bagel seasoning!
Comparison: PCOS-friendly vs. foods to avoid
| Food Category | Recommended (Hormone Helpers) | Limit or Avoid (Hormone Disruptors) |
|---|---|---|
| Carbohydrates | Quinoa, oats, sweet potatoes | White bread, pastries, sugary cereal |
| Drinks | Green Tea, infused water | Soda, energy drinks, and excess caffeine |
| Snacks | Almonds, berries, Greek yogurt | Chips, cookies, processed candy |
Randomized controlled trials (RCTs) have shown that following a low glycemic index diet may be associated with more regular ovulation in women with PCOS and insulin resistance, likely due to improvements in insulin sensitivity and androgen levels.
One supplement that has received meaningful research attention for PCOS is myo-inositol. Research suggests it may support ovarian function, oocyte quality, and embryo development in women with PCOS, particularly when used consistently alongside dietary changes. I may be worth discussing with your doctor.The Journal of Clinical Endocrinology & Metabolism has shown that the use of metformin to treat PCOS in conjunction with a proper diet. This aids in reducing PCOS symptoms, increasing weight loss, and the likelihood of conceiving.
Other lifestyle changes to improve PCOS symptoms and fertility
There are so many aspects of our daily lives that impact hormones. Besides diet, other lifestyle changes also improve your PCOS symptoms.
Improve PCOS symptoms and fertility by:
- Maintaining a BMI between 20-25 for optimal fertility
- Getting at least 7 hours of sleep each night
- Managing stress in relaxing ways such as yoga, meditation, acupuncture, or a favorite hobby
- Refraining from smoking and using drugs or THC-containing products
Lifestyle changes associated with a healthy diet can make PCOS more manageable while also making you feel better overall!
What is the best exercise for PCOS?
A combination of strength training and low-intensity steady-state (LISS) cardio, such as walking, tends to work well for women with PCOS. Strength training in particular may support how your body processes carbohydrates by increasing insulin receptor activity in your muscles, which is relevant if insulin resistance is part of your picture.
What is the 30-30-30 rule for PCOS?
The 30-30-30 rule means eating 30 grams of protein within 30 minutes of waking up, followed by 30 minutes of low-intensity exercise. This method is designed to support steadier blood sugar after the overnight fast and reduce the mid-day energy dips that many women with PCOS experience.
Living with PCOS
Change doesn’t happen overnight so please use our suggestions as a guide to optimizing your fertility with PCOS. Make a few changes at a time and experiment with new foods – have fun with it! Feeling overwhelmed? We are here to support you and help you achieve the pregnancy you are dreaming of! Schedule a virtual consultation with someone from our medical team to discuss any concerns you may have about navigating your fertility journey with PCOS in our Premom app.
How does Premom help you track your PCOS?
Meet PCOS Pro: Built for cycles that don’t follow a predictable pattern
Irregular cycles are harder to track with tools designed for textbook 28-day cycles. PCOS Pro is a 6-month pass inside the Premom app built specifically for people with irregular cycles or PCOS.
It’s a one-time purchase, not a subscription. It doesn’t auto-renew. And it’s separate from Premom Premium, so you can use it with or without a membership.
How PCOS Pro Helps You
This pass may help you feel more in control of your body. Here is what you get:
- Tracking tools built for complex and irregular cycles.
- Daily health logs for your sleep, what you eat, and your stress levels.
- Cycle pattern insights that build over time as your data grows, so you can understand your body more clearly.
- Guides and educational tips from experts focused on PCOS and hormonal health
Take the Next Step
Want to learn more about your body? Get Your PCOS Pro 6-Month Pass Here. One-time purchase. No recurring fees.
Frequently Asked Questions: PCOS diet, exercise, and lifestyle
The most effective PCOS diet is a low-glycemic index (GI) plan that focuses on whole, unprocessed foods. This approach emphasizes lean proteins, healthy fats like Omega-3s, and fiber-rich vegetables to keep insulin levels stable. Cutting back on refined sugars may help support more balanced androgen levels and a more regular cycle over time.
While PCOS is a long-term condition, lifestyle changes may help manage“reverse“ symptoms to the point where they no longer interfere with daily life. Regular exercise, a low-GI diet, and adequate sleep may help restore more regular ovulation and metabolic function.
Green tea may offer supportive benefits for individuals with PCOS, particularly due to its antioxidant content. Some studies suggest it may modestly support metabolic health, including insulin sensitivity and weight management in certain individuals. There is also limited evidence that it may help influence androgen levels, though findings are not consistent. Incorporating green tea as part of an overall balanced lifestyle may be a helpful addition, but it should not be relied upon as a primary intervention for hormonal balance.
A PCOS flare-up typically involves a sudden increase in symptoms such as skin breakouts, extreme fatigue, bloating, and mood swings. These often occur during times of high stress or poor nutrition, indicating that the body’s inflammation levels and androgen production have increased temporarily.
Disclaimer: This article is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any medical condition. Always consult a qualified healthcare provider for personalised medical advice regarding menstrual health, fertility, or hormonal concerns.
References
- Hazlehurst JM, et al. How to manage weight loss in women with obesity and PCOS seeking fertility? Clin Endocrinol. 2022;97(2):208-216. https://pubmed.ncbi.nlm.nih.gov/35319122/
- Gholizadeh S, et al. Effect of a low glycemic diet in patients with polycystic ovary syndrome and anovulation – a randomised controlled trial. PubMed. 2022. https://pubmed.ncbi.nlm.nih.gov/29734548/
- Pasquali R, Gambineri A, Biscotti D, et al. Effect of long-term treatment with metformin added to a hypocaloric diet on body composition, fat distribution, and androgen and insulin levels in abdominally obese women with and without the polycystic ovary syndrome. J Clin Endocrinol Metab. 2000;85(8):2767-2774. https://pubmed.ncbi.nlm.nih.gov/10946879/
- World Health Organization. Polycystic ovary syndrome.https://www.who.int/news-room/fact-sheets/detail/polycystic-ovary-syndrome. Published June 28, 2023.
- How to manage weight loss in women with obesity and PCOS seeking fertility? – Hazlehurst – 2022 – Clinical Endocrinology – Wiley Online Library
- PCOS (Polycystic Ovary Syndrome) and Diabetes | CDC
- Effect of green tea on metabolic and hormonal aspect of polycystic ovarian syndrome in overweight and obese women suffering from polycystic ovarian syndrome: A clinical trial – PMC (nih.gov)
- Correlation Between Daily Energy Intake from Fat with Insulin Resistance in Patients with Polycystic Ovary Syndrome – PMC (nih.gov)
- Effect of a low glycemic diet in patients with polycystic ovary syndrome and anovulation – a randomized controlled trial – PubMed (nih.gov)
- Effectiveness of Omega-3 fatty acid for polycystic ovary syndrome: a systematic review and meta-analysis – PubMed (nih.gov)
- Sleep_and_fertility.pdf (theseus.fi)
- https://www.fertilityassociates.co.nz/understanding-your-fertility/bmi-calculator/#:~:text=You%20should%20aim%20for%20a,having%20a%20baby%20with%20malnutrition
- Effect of Long-Term Treatment with Metformin Added to Hypocaloric Diet on Body Composition, Fat Distribution, and Androgen and Insulin Levels in Abdominally Obese Women with and without the Polycystic Ovary Syndrome | The Journal of Clinical Endocrinology & Metabolism | Oxford Academic (oup.com)
