Feeling lightheaded, foggy, or dizzy a few weeks into a calorie deficit?

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Shared September 21, 2026

Most people immediately assume it’s just low blood sugar or lack of willpower. But the real mechanism runs much deeper into your hormonal stress response: Cortisol. Here is what actually happens inside your body: 1. The Energy Crisis: When you cut calories too aggressively or maintain an unbroken deficit for too long, your brain perceives starvation and triggers the adrenal glands to pump out cortisol. 2. Fat Mobilisation Gets Obstructed: Paradoxically, chronically elevated cortisol combined with high physiological stress impairs optimal lipolysis (fat mobilisation) and disrupts insulin sensitivity. 3. The Hunger & Craving Spike: Because your cells struggle to efficiently tap into stored fat for fuel, your brain sounds the emergency alarm—driving intense cravings and gnawing hunger to force you to eat. 4. The Crash: When you ignore those physiological alarm bells to stick strictly to your deficit, your circulating glucose drops, cellular energy falters, and dizziness sets in. 💡 The Fix: 1. Don't force extreme deficits (-700 to -1000 kcal). 2. Keep electrolyte intake (sodium, potassium, magnesium) balanced. 3. Use diet breaks or refeed days at maintenance to reset cortisol and signal safety to your nervous system. Weight loss is biochemistry, not a battle against your biology! 🧠⚡ #kapilkanodia #holistichealth #emotionalhealth #stress #cortisol