Insulin Resistance and PMOS: What’s Really Going On and How a Dietitian Can Help

One of the biggest pieces of the PMOS puzzle is insulin resistance. It affects hormones, cycles, fertility, energy and long‑term health. Many people are told they have it without ever having it explained in a way that makes sense. This guide breaks down what insulin resistance is, how it links to PMOS, and how working with a PMOS dietitian can support your hormones, cycles and overall wellbeing. 

If you’ve recently been diagnosed with PMOS (Polyendocrine Metabolic Ovarian Syndrome), you might still see the older name PCOS (Polycystic Ovary Syndrome) used online or in clinics. The condition was renamed in 2026 because the old name focused too much on ovaries and “cysts” and didn’t reflect the metabolic and hormonal drivers that sit at the centre of this condition. You can read more about the name change here and via our blog: PMOS: The New Name For PCOS

What Is Insulin Resistance?

Insulin is a hormone that helps move glucose from the bloodstream into cells for energy. Insulin resistance happens when the body’s cells stop responding well to insulin. When our cells don’t respond properly, the body produces more insulin to compensate. Over time this can lead to:

• higher insulin levels

• higher blood sugar levels

• Increased feelings hunger

• increased inflammation

• changes in how your body stores fat

• Increased risk of developing type 2 diabetes and heart disease

Insulin resistance is influenced by your genetics, hormones, sleep and stress.

How Insulin Resistance Links to PMOS

Most people with PMOS have some degree of insulin resistance and this is true across all body sizes. Research shows that three of the four PMOS phenotypes are driven by insulin resistance.

Changes in fat tissue can raise inflammation in the body and make it harder for cells to respond to insulin. When this happens, it can trigger a chain of hormonal changes. One of these changes is a drop in sex hormone binding globulin, which allows more androgens to circulate in the body. Higher androgen levels can then affect many areas of health, including skin, hair, cycles and ovulation. 

PMOS Hormone chain reaction:

Androgen levels

Higher insulin levels can lower sex hormone binding globulin (SHBG). When SHBG is low, more androgens are free in the body. Higher androgen levels can lead to acne, extra facial or body hair (hirsutism) and hair thinning on the scalp.

Ovulation

Changes in the pattern of luteinising hormone (LH) and follicle stimulating hormone (FSH) can make it harder for the ovary to get a clear signal to release an egg. This can lead to irregular cycles and fewer ovulations each year.

Fertility

Irregular ovulation lowers the chance of conception. Many people with Polyendocrine Metabolic Ovarian Syndrome (PMOS) still have the same number of children as those without PMOS. It often just takes more time for ovulation to become regular enough for pregnancy to occur.

Common Myths About PMOS and Insulin Resistance

Carbs are the problem

Very low‑carb diets may help a small group for a short time. They are restrictive and difficult to maintain.

Dairy and gluten cause inflammation

There is no strong evidence for this. Dairy is often anti-inflammatory. Symptoms are more often related to lactose or fructans.

Strength training increases androgens

Strength training supports insulin sensitivity and hormone balance.

PMOS means you cannot get pregnant

Many people conceive naturally. It may take longer, but fertility is often very responsive to lifestyle and nutrition support.

Supplements fix PMOS

Supplements can help but they do not cure PMOS. Inositol, berberine, vitamin D, omega‑3s, magnesium and B12 (if taking metformin) have the strongest evidence. BUT, they need to be tailored to the individual.

How Nutrition Supports Insulin Resistance in PMOS

Research shows that an anti‑inflammatory style of eating is one of the most helpful approaches for managing PMOS. The DASH diet is a strong example of this pattern. It focuses on plenty of vegetables, fruit, whole grains, legumes, nuts, seeds and lean proteins. It also keeps salt intake lower, which is important because people with PMOS have a higher risk of heart and metabolic conditions. The DASH diet is a way of eating that supports hormone balance, reduces inflammation and improves insulin sensitivity. 

Key nutrition strategies

• Balanced meals with protein, fibre and low‑GI carbohydrates

• Plenty of vegetables, fruit, legumes, nuts and seeds

• Whole grains

• Moderate dairy

• Three to four serves of fish per week

• Limiting red meat to two or three serves per week

• Reducing added sugars and ultra‑processed foods

• Reducing sodium to support heart health

  
  

This is where PMOS nutrition support from an Accredited Practising Dietitian becomes helpful. The right approach varies from person to person.

Lifestyle Factors That Improve Insulin Sensitivity

Movement

• Aim for 150 to 300 minutes of moderate activity each week

• Include two or three resistance sessions

• Reduce long periods of sitting

Sleep

PMOS can affect circadian rhythm. This can lead to fatigue, cravings and higher cortisol. Improving sleep hygiene supports hormone balance.

Stress

Chronic stress increases cortisol. This can worsen insulin resistance and androgen levels. Stress‑reduction strategies are part of PMOS care.

How a Dietitian Supports PMOS and Insulin Resistance

At Sage Dietitians, we can help you:

• Improve insulin sensitivity through personalised nutrition

• Reduce inflammation

• Support regular ovulation

• Improve fertility outcomes

• Manage digestive symptoms

• Choose supplements safely

• Build sustainable habits

• Improve energy, mood, sleep and metabolic markers

At Sage Dietitians, we take a holistic, non‑restrictive, evidence‑based approach. We focus on clinical markers and how you feel.

Want support tailored to you?

PMOS is complex and understanding insulin resistance is a powerful first step toward feeling more in control of your hormones, cycles and long‑term health.

If you are looking for evidence‑based PMOS nutrition support, personalised guidance and a compassionate approach that fits your life, we are here to help.

Sage Dietitians are a virtual clinic, we are based in Chelsea Heights, Melbourne Australia and support clients across Australia via tele-health appointments

To work with our online women’s health dietitians, use the link to book an appointment