Insulin Resistance: What It Means, Who Is at Risk and What May Help

By Urooj, Clinical Nutritionist

Insulin resistance is often described online through long lists of symptoms: tiredness after meals, sugar cravings, stubborn weight, acne or darkened skin. Some of these concerns deserve attention, but none can confirm insulin resistance on its own.

The more useful starting point is this: insulin resistance is a change in how the body responds to insulin, and it is often silent. It can exist before routine glucose results become abnormal. It can also contribute to prediabetes and type 2 diabetes over time, but these terms do not mean exactly the same thing.

What insulin resistance actually means

Insulin is a hormone made by the pancreas. It helps glucose move from the bloodstream into cells, where it can be used for energy. When muscle, fat and liver cells respond less effectively to insulin, the pancreas may produce more insulin to keep blood glucose within range.

For a while, this compensation may work and a person may have no symptoms. If the pancreas can no longer keep up, blood glucose may rise into the prediabetes range and, in some people, eventually the diabetes range.

This is why insulin resistance is not automatically diabetes. It describes reduced responsiveness to insulin. Prediabetes and diabetes are diagnosed using glucose-based criteria.

Who is more likely to be at risk?

Risk is shaped by several factors, and it is not a moral judgment about food or body size. A clinician may consider screening more strongly if you have:

• a parent or sibling with type 2 diabetes;
• PCOS;
• a history of gestational diabetes;
• overweight, obesity or a larger waist circumference;
• low levels of regular physical activity;
• sleep apnoea;
• high blood pressure, raised triglycerides, low HDL cholesterol or fatty liver disease;
• long-term use of medicines that may affect glucose, such as glucocorticoids or some antipsychotic medicines.

People in smaller bodies can also develop insulin resistance or abnormal glucose. Likewise, a larger body does not prove either condition. History, measurements and appropriate laboratory tests matter more than assumptions.

Can symptoms tell you that you have insulin resistance?

Usually not. Insulin resistance and prediabetes often have no obvious symptoms. Dark, thickened patches of skin, sometimes seen around the neck or underarms, can be associated with insulin resistance, but they can have other explanations and still require professional assessment.

Persistent thirst, frequent urination, blurred vision, unexplained weight loss, repeated infections or unusual fatigue can occur when blood glucose is high. These are reasons to arrange medical testing, not proof of insulin resistance.

Seek urgent medical help if high-glucose symptoms occur with vomiting, severe weakness, confusion, marked drowsiness or deep, rapid breathing.

Which tests are actually useful?

There is no single routine test that neatly confirms insulin resistance for everyone. The direct tests used to measure insulin resistance are mainly research tools. Commercial packages may offer fasting insulin or calculate HOMA-IR, but there is no universally accepted cutoff that should be used to self-diagnose.

In everyday care, a clinician usually assesses whether glucose regulation is becoming abnormal and reviews the wider risk picture. Common tests include:

• A1C: estimates average blood glucose over roughly the previous two to three months;
• fasting plasma glucose: measures glucose after an overnight fast;
• oral glucose tolerance test: measures the body's response before and after a glucose drink.

For general adult screening, the commonly used prediabetes ranges are A1C from 5.7% to 6.4%, fasting plasma glucose from 100 to 125 mg/dL, or a two-hour oral glucose tolerance result from 140 to 199 mg/dL. These values identify prediabetes, not insulin resistance itself. Pregnancy uses different testing pathways, and conditions affecting red blood cells can make A1C less reliable. Results should be interpreted by a qualified clinician.

What changes if you have PCOS?

Insulin resistance is one important biological feature in many people with PCOS, but it is not present in exactly the same way in everyone. The 2023 international PCOS guideline recommends assessing glycaemic status at diagnosis in adults and adolescents with PCOS, regardless of body mass index.

The guideline identifies the 75 g oral glucose tolerance test as the most accurate way to assess glycaemic status in PCOS. If that test cannot be performed, fasting glucose or A1C may be considered, although they are less accurate in this context. The same guideline says routine insulin assays have limited clinical relevance.

If you have PCOS, ask your clinician what test and repeat-testing interval suit your age, pregnancy plans, medicines, family history and previous results. Our PCOS guide explains the wider reproductive, metabolic and emotional picture.

Anonymous composite example

This example combines common clinical patterns and does not describe a real FemFit customer.

A 30-year-old teacher in Karachi has PCOS and a parent with type 2 diabetes. She has seen social posts suggesting that afternoon tiredness and cravings prove insulin resistance, so she is considering an expensive fasting-insulin package.

Instead, she takes her history and previous reports to a clinician. They review her blood pressure, waist measurement, medicines and sleep, then select appropriate glucose and lipid tests. She also begins with changes she can sustain: adding protein and vegetables to lunch, replacing most sugary drinks with water, and walking after dinner when practical.

The point is not a promised outcome. It is that risk-based testing and repeatable habits are more useful than diagnosing yourself from symptoms or one fashionable laboratory number.

What may help improve insulin sensitivity?

Insulin sensitivity can improve, but there is no single food, tea, powder or workout that guarantees a result. The strongest approach combines several realistic habits and treats related conditions when needed.

Build meals around balance, not bans

You do not need to remove all rice, roti or fruit. Try pairing carbohydrate foods with fibre, protein and unsaturated fat. A Pakistani plate might include sabzi or salad, daal or chana, chicken, fish, egg or plain yoghurt, plus a portion of roti or rice that fits your needs. Choose whole fruit more often than juice, and reduce repeated sugary drinks and highly refined snacks.

A qualified nutrition professional can adapt this pattern for budget, household meals, pregnancy, kidney disease, an eating disorder history or other medical needs.

Use movement in more than one way

Regular aerobic activity helps muscles use glucose, while strength training supports muscle function and insulin sensitivity. Walking, stairs, home-based resistance work and shorter movement breaks all count. Start at a safe level and build gradually, especially if you have chest symptoms, significant joint pain, pregnancy complications or another condition that affects exercise.

Protect sleep and review contributing conditions

Consistently short or disrupted sleep can make appetite, activity and glucose management harder. Ask about possible sleep apnoea if you snore loudly, wake unrefreshed or have marked daytime sleepiness. Also review medicines and medical conditions with your clinician rather than stopping treatment yourself.

Use medication only when clinically indicated

Some people with prediabetes, diabetes or PCOS may be offered medicines such as metformin. The decision depends on diagnosis, risk, pregnancy plans, kidney function, side effects and other factors. Medication is not a substitute for supportive nutrition and movement, and it should not be started from an online checklist.

A practical next-step plan

1. Write down your risk factors. Include family history, PCOS, gestational diabetes, medicines, sleep and previous glucose results.
2. Book an appropriate review. Ask which glucose test is suitable instead of requesting fasting insulin by default.
3. Choose one food change. For example, add a protein source to breakfast or replace one regular sugary drink.
4. Add repeatable movement. Begin with a walk after one meal, regular movement breaks or two simple strength sessions a week if safe.
5. Plan follow-up. Ask when results should be repeated and which blood pressure or lipid markers also need attention.

Insulin resistance can overlap with the five-marker pattern explained in our metabolic syndrome guide, but the two terms are not interchangeable.

The takeaway

Insulin resistance is often silent, cannot be confirmed from cravings or fatigue, and is not the same as diabetes. If you have PCOS or another risk factor, ask for appropriate glucose assessment and a plan that fits your health and daily life.

FemFit supports practical, evidence-aware metabolic health without shame or shortcuts. Small actions matter most when they are safe, repeatable and connected to proper follow-up.

This article is for education only and does not replace personal medical advice, examination, testing or diagnosis.