Is Leptin Resistance?
Leptin is a hormone produced by fat cells that sends a signal to the brain: "I am full, enough eating." The more fat you have, the more leptin you produce. But paradoxically, people with obesity have a very high leptin level, yet their brains "do not hear" it. This is called leptin resistance.
Imagine that leptin is a sound. Under normal function, the leptin signal is clear. In the case of leptin resistance, the sound is very strong, but the ears are "blocked." The brain thinks you are starving, although in reality fat stores are overfilled. This causes increased hunger and a reduced energy expenditure rate.
🔍 Leptin Resistance Symptoms
- Constant Hunger even after a large meal. You feel that you are never "really full."
- Weight No Longer Drops, even though calorie intake is very low (the paradox: the less you eat, the more stubbornly the body "holds on to" fat).
- Fat Accumulates in the Abdominal Area (visceral fat), rather than subcutaneously.
- Cravings to eat late in the evening / at night. The leptin circadian rhythm is disrupted.
- Fatigue after meals. Instead of energy, you feel drowsiness.
- Emotional instability, symptoms of depression. Leptin also affects mood-regulating pathways in the brain.
- Weight Loss Is Slow and Difficult, even with a strict diet and exercise.
🔬 How Does Leptin Resistance Develop?
🔥 Inflammation
Chronic low-grade inflammation (characteristic of obesity) damages leptin receptors in the hypothalamus. Inflammatory cytokines (CRP, IL-6, TNF-α) directly block the leptin signal.
🩸 High Insulin Level
Hyperinsulinemia (excess insulin) competes with leptin for the same signaling pathways in the brain. This is one of the reasons why insulin resistance and leptin resistance often go together.
🧪 High Triglyceride Level
Triglycerides directly block leptin transport across the blood-brain barrier. Even if there is a lot of leptin in the blood, it does not reach the brain.
🍟 Processed Food
Trans fats, fructose syrup, refined carbohydrates, emulsifiers — everything that causes inflammation in the gut and the body.
💡 How to Restore Leptin Sensitivity?
- Reduce Inflammation. Omega-3 fatty acids (fish, fish oil), antioxidants (berries, vegetables), anti-inflammatory nutrition.
- Avoid Processed Food. Especially fructose syrup, trans fats, and refined carbohydrates. They are the main drivers of leptin resistance.
- Quality Sleep. Sleep deprivation reduces leptin levels by 15–20%. Sleep 7–9 hours in a dark room.
- Do Not Follow Very Strict Diets. Sudden calorie reduction (>30%) can reduce leptin levels within a week! This causes a "rebound" — hunger attacks.
- Strength Training. Increases leptin sensitivity through improved body composition and reduced inflammation.
- Intermittent Fasting (IF). The 16:8 or 14:10 protocol can improve the leptin circadian rhythm.
- Consider Carbohydrate Cycling. Periodic higher-carbohydrate days help "reset" the leptin signal.
💡 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.