The four types of PCOS and how to support each one

Around 10% of women are diagnosed with PCOS, making it one of the most common hormonal conditions in women of reproductive age. Yet the majority of women who receive that diagnosis leave their GP appointment with little understanding of what is actually driving their symptoms - or that there are four distinct types of PCOS, each requiring a different approach.

This matters because a protocol that works well for one type can be ineffective or even counterproductive for another. Identifying your type is the starting point for meaningful support.

First: is it actually PCOS?

Before getting into the types, it is worth clarifying what PCOS actually is - because it is frequently misdiagnosed.

Polycystic ovary syndrome is not defined by the presence of cysts on the ovaries alone. Ovarian cysts can appear for a number of reasons and are not unique to PCOS. The correct diagnostic criteria require either irregular or absent periods, or polycystic ovaries on ultrasound, combined with elevated androgens on a blood test or clinical signs of androgen excess such as facial hair growth, acne, or hair thinning.

If your main symptom is pelvic pain, this is not a symptom of PCOS and should be investigated separately - conditions like endometriosis are more likely drivers of pain.

The four types of PCOS

1. Insulin resistant PCOS

This is the most common type, affecting around 70% of women with PCOS. It develops when the body produces too much insulin - often in response to a diet high in refined carbohydrates and sugar, combined with other factors including chronic stress, poor sleep, alcohol, and gut dysbiosis.Excess insulin impairs ovulation and stimulates the ovaries to produce testosterone rather than oestrogen, driving the elevated androgen symptoms characteristic of PCOS: irregular cycles, acne, and unwanted hair growth.

What to do

Blood sugar regulation is the central focus. This means reducing refined carbohydrates and sugar, building every meal around protein, fibre, and healthy fats, and avoiding long gaps between meals that lead to blood sugar crashes. Inositol - particularly the combination of myo-inositol and D-chiro-inositol - has strong evidence for improving insulin sensitivity in PCOS and supporting ovulation. Resistance training is also highly effective at improving insulin sensitivity and is worth prioritising over cardio-focused exercise for this type.

2. Post-pill PCOS

This type occurs after stopping hormonal contraception, particularly the combined oral contraceptive pill. The pill suppresses ovulation and, in some women, the body takes a significant amount of time to restore its natural hormonal rhythm once it is stopped. The result can be absent or irregular periods, sometimes for many months.Some pills are also anti-androgenic, meaning they artificially suppress androgens. When these are stopped, there can be a rebound surge in androgens that produces the characteristic symptoms of PCOS - acne, hair growth, hair loss - even in women who had none of these symptoms before the pill.

What to do

The good news is that this type is usually temporary. The focus is on nutritional support for ovulation: adequate zinc, B vitamins, vitamin C, and healthy fats are all essential for the hormone cascade that leads to ovulation. Seed cycling - incorporating specific seeds at different points in the cycle to support oestrogen and progesterone production - can also be a useful supportive tool. Patience is required, but most women see cycles return within three to six months with appropriate support.

3. Inflammatory PCOS

Chronic low-grade inflammation is an increasingly common driver of PCOS, and one that is frequently missed because it does not always present with obvious inflammatory symptoms. Sources of chronic inflammation include a diet high in ultra-processed foods and refined seed oils, environmental toxins, smoking, gut dysbiosis, and unmanaged stress.Inflammation disrupts hormone receptor signalling and impairs ovulation. It can also worsen insulin resistance, meaning this type often overlaps with type one.

What to do

An anti-inflammatory dietary approach is the primary intervention - broadly aligned with Mediterranean-style eating: abundant vegetables, oily fish, olive oil, nuts, seeds, legumes, and limited ultra-processed food. Specific anti-inflammatory nutrients worth considering include omega-3 fatty acids (EPA and DHA from oily fish or fish oil), curcumin, and vitamin D, which has both anti-inflammatory and reproductive benefits. Gut health is also worth addressing directly, as intestinal permeability and dysbiosis are common drivers of systemic inflammation.

4. Adrenal PCOS

This is the least common type and requires a thorough clinical assessment to diagnose correctly. It is characterised by elevated DHEAS (dehydroepiandrosterone sulphate) - an adrenal androgen - rather than elevated testosterone from the ovaries. This distinction is important because it means the ovaries are not the primary driver, and approaches targeting ovarian androgen production will be less effective.Raised DHEAS is associated with an abnormal or dysregulated stress response. Women with adrenal PCOS often have a history of chronic stress, adrenal fatigue, or an exaggerated cortisol response to physical or psychological stressors.

What to do

Stress management is the central pillar - not as a lifestyle suggestion but as a genuine clinical priority. Adaptogenic herbs including ashwagandha and rhodiola have evidence for modulating the stress response and reducing DHEAS in some women. Adequate sleep, reducing overtraining (particularly high-intensity exercise, which is an additional adrenal stressor), and addressing the root causes of chronic stress are all important. Testing is essential here - do not assume adrenal PCOS without confirming elevated DHEAS on a blood test.

Why identifying your type matters

The overlap between types is common. Many women have elements of more than one - insulin resistant PCOS with an inflammatory component, for example, or post-pill PCOS with adrenal involvement. This is why a one-size-fits-all approach to PCOS support so often falls short.Understanding which mechanisms are driving your symptoms allows for a targeted intervention that addresses root causes rather than managing symptoms in isolation. Blood testing is an essential part of this process - not just the basic tests offered through a GP, but a comprehensive panel covering androgens, insulin, DHEAS, inflammatory markers, and nutrient status where relevant.

Working with a registered practitioner

If you have been diagnosed with PCOS and want to understand which type you have and what to do about it, this is exactly the kind of assessment and support I offer. We work through your symptoms, your history, and your blood results to build a clear picture and a practical plan.Book a free 20-minute consultation to find out how I can help, or explore my Women's Health Nutrition Packages.