Insulin resistance is a metabolic disorder that affects adults and, increasingly, adolescents. Although it often develops silently, it can lead to serious health consequences such as prediabetes, type 2 diabetes, and metabolic syndrome.
LuMedic in Warsaw is a medical center that helps identify the causes and symptoms of this condition.
What is insulin resistance and how does it affect the body?
Insulin resistance occurs when the body’s cells no longer respond properly to insulin — a hormone responsible for regulating blood glucose levels. As a result, the pancreas produces more and more insulin in an attempt to “overcome” the resistance of the tissues. Over time, this excess insulin can lead to prediabetes, type 2 diabetes, and other metabolic disturbances.
Insulin and carbohydrate metabolism – a simple explanation
Insulin acts like a key that opens cells, allowing them to absorb glucose from the blood. When cells become less sensitive to insulin, glucose cannot enter them efficiently and begins to accumulate in the bloodstream. In response, the pancreas increases insulin production, leading to hyperinsulinemia – a condition characterized by chronically elevated insulin levels.
Why is insulin resistance becoming more common?
The modern lifestyle plays a major role. Many people spend long hours sitting at desks, consume high-sugar and high-fat foods, and experience chronic stress and lack of physical activity. Genetic and hormonal factors also contribute, further increasing the risk of developing insulin resistance.
The most common causes of insulin resistance
Lifestyle, diet, and lack of physical activity
Excess calorie intake – especially from simple sugars and saturated fats – promotes the accumulation of visceral fat (around the abdomen). This type of fat increases tissue resistance to insulin. A sedentary lifestyle makes things worse: muscles use less glucose, allowing more of it to remain in the blood.
Genetic predisposition and hormonal disorders
Some individuals develop insulin resistance despite leading a healthy lifestyle. These cases are often related to genetic or hormonal factors. Disorders of the thyroid gland, adrenal glands, or ovaries can play a key role. Insulin resistance is also more likely to develop during perimenopause, when ovarian hormone production naturally decreases.
Connection with Polycystic Ovary Syndrome (PCOS)
In women, insulin resistance often coexists with PCOS (Polycystic Ovary Syndrome). Elevated insulin levels can disrupt hormonal balance and cause:
– irregular menstrual cycles,
– acne,
– excessive hair growth,
– difficulty conceiving.
Symptoms that may indicate insulin resistance
Weight gain despite dieting
One of the most common signs is weight gain, especially around the abdomen, despite following a healthy diet and reducing calorie intake. Excess insulin promotes fat storage and makes weight loss more difficult.
Sleepiness after meals and difficulty concentrating
High insulin levels and glucose fluctuations can cause fatigue, drowsiness, difficulty focusing, and hunger attacks shortly after eating. These symptoms should not be ignored and require specialist evaluation.
Difficulty losing weight and chronic fatigue
Even with regular exercise and a healthy diet, people with insulin resistance often see no results. Persistent fatigue, low energy, and mood swings are also common. That’s why it’s important to seek help from an endocrinologist instead of ignoring the problem.
How is insulin resistance diagnosed?
Laboratory tests: glucose, insulin, HOMA-IR index
Diagnosis is based on blood tests measuring fasting glucose and insulin levels, and calculating the HOMA-IR index, which assesses their relationship. Sometimes doctors also order a glucose-insulin tolerance test (OGTT with insulin).
When should you see an endocrinologist?
A visit is recommended if you experience any of the above symptoms, have difficulty losing weight, or a family history of type 2 diabetes. An endocrinologist can identify the cause of insulin resistance and create an individualized treatment plan.
Treatment of insulin resistance – key steps
Lifestyle changes and physical activity
The cornerstone of treatment is a lifestyle modification: a balanced diet with a low glycemic index, regular meals, and physical activity at least 3–4 times a week.
Important: Losing just 5–10% of body weight can significantly improve insulin sensitivity.
Pharmacological support – when is it needed?
Each case is different. In some situations, the doctor may prescribe medications that increase tissue sensitivity to insulin – most commonly metformin. It is used both in people with type 2 diabetes and in those with insulin resistance.
The role of the specialist – the endocrinologist as key support
Treating insulin resistance requires an individualized, holistic approach. The endocrinologist selects the right therapy and guides the patient through sustainable lifestyle changes. Regular follow-up visits are essential to monitor progress and adjust treatment if necessary.
Summary – the earlier insulin resistance is diagnosed, the easier it is to control
To sum up, insulin resistance doesn’t always lead to prediabetes, diabetes, or other metabolic complications – if it is diagnosed and treated early.
At LuMedic in Warsaw, patients have access to comprehensive diagnostics and treatment of insulin resistance based on up-to-date medical knowledge and an individualized approach.
Patients can seek help from:
Dr. Luiza Napiórkowska, MD, PhD,
Dr. Anna Kępczyńska-Nyk, MD, PhD,
Dr. Anna Lewicka, MD, PhD,
and dietitian Aleksandra Bąk, MSc –
a multidisciplinary team offering modern, empathetic care for those struggling with hormonal and metabolic disorders.