Why Afternoon “Laziness” Is Often Physiological Feeling foggy or unmotivated after lunch is often basic physiology, not willpower. 🩸 Blood shifts to the gut after meals After a large meal, especially high in carbs or fat, the body activates a digestion-focused state. Blood flow is preferentially redirected to the gastrointestinal tract, known as the splanchnic circulation, to support digestion and absorption. Mixed meals significantly increase gut blood flow and oxygen demand (PMID: 16373281; 2
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