What Is Insulin Resistance?
Insulin resistance is a condition in which the body's cells become less sensitive to insulin, so the pancreas must secrete more and more insulin to maintain normal blood sugar levels. It's like a "key and lock" — insulin is the key that opens the cell door for glucose, and in resistance the locks rust.
Insulin resistance is the main cause of type 2 diabetes, metabolic syndrome and obesity. In Lithuania, about 30% of adults have some degree of insulin resistance, and most don't know about it.
🔍 Symptoms of Insulin Resistance
Most people feel no symptoms until the condition is advanced. Here's what to look out for:
🔍 Physical Symptoms
Fatigue after meals (especially after a carbohydrate-rich one), accumulation of abdominal fat, dark skin patches (on the neck, in the armpit area), skin tags, high blood pressure.
📊 Metabolic Symptoms
Difficulty losing weight, cravings for sweets and carbohydrates, hunger soon after a meal, elevated blood triglycerides, low HDL ("good") cholesterol.
🧬 Hormonal Symptoms
In women: irregular periods, PCOS, acne. In men: reduced testosterone, decreased libido.
📊 Causes of Insulin Resistance
| Cause | Mechanism | Strength of effect |
|---|---|---|
| Overweight / obesity | Visceral fat releases inflammatory cytokines that reduce insulin sensitivity | Very high |
| Sedentary lifestyle | Muscles are the main glucose "consumers". Unused muscles become insulin resistant | High |
| Sugar and refined carbohydrates | Constant insulin spikes "exhaust" the receptors | High |
| Chronic stress | Cortisol increases blood sugar, which requires more insulin | Intermediate |
| Sleep Deprivation | One sleepless night can reduce insulin sensitivity | Intermediate |
| Genetics | A predisposition can be inherited (especially if parents had type 2 diabetes) | Intermediate |
| Chronic inflammation | Inflammatory markers (CRP, IL-6) directly interfere with insulin signaling | Intermediate |
💡 How to Improve Insulin Sensitivity?
- Reduce body weight. Even a 5–7% weight loss can significantly improve insulin sensitivity.
- Strength training 3–4x/week. Muscle contraction activates GLUT4 transporters, which carry glucose into cells even without insulin.
- Walk after meals. 10–15 min of walking after a meal reduces the glucose spike.
- Reduce sugar and simple carbohydrates. Especially sugary drinks — they most quickly raise insulin levels.
- Eat more fiber. Soluble fiber slows glucose absorption.
- Include cinnamon, apple cider vinegar. Cinnamon is thought to improve insulin sensitivity, and apple cider vinegar before meals reduces the glucose spike by 20–30%.
- After consulting a doctor, consider supplements: magnesium, chromium, berberine, alpha-lipoic acid. In some studies, berberine acts similarly to metformin.
- Intermittent Fasting (IF). A 16:8 protocol can improve insulin sensitivity within 2–4 weeks.
⚠️ When to See a Doctor?
• You have 3+ of the symptoms listed above
• There are cases of type 2 diabetes in your family
• Your BMI > 30 or waist circumference > 94 cm (men) / > 80 cm (women)
• Weight does not come off despite your efforts
Research: Fasting glucose, HbA1c, HOMA-IR index, blood insulin level.
💡 Practical Everyday Tips
📋 Track Progress
Use a diary or app. Weekly trends are more important than daily fluctuations. Regularly measure not only weight but also circumferences.
💧 Drink Enough Water
2–3 liters per day. Water aids digestion and metabolism and reduces false hunger.
😴 Sleep 7–9 Hours
Quality sleep is essential for hormonal balance, muscle recovery, and appetite control.
🏃 Move Every Day
Even 30 minutes of walking per day can significantly improve metabolism and mood.