Feeling tired after eating is a common phenomenon caused by several factors. It often happens because your body uses extra energy to digest a large or calorie-dense meal, especially if it is rich in carbohydrates and fats. These foods can cause blood sugar spikes followed by a drop, which makes you feel sleepy. Hormones like insulin, serotonin, and cholecystokinin, released after eating, also contribute to this tiredness. Additionally, certain foods containing tryptophan, melatonin, or high fat can make you feel more tired. Other contributing factors include meal size, meal timing, your overall sleep quality, physical activity, and sometimes underlying health conditions such as diabetes, hypothyroidism, or food intolerances. To minimize post-meal tiredness, try eating smaller, balanced meals more frequently, include protein and fiber to slow digestion, avoid excessive carbs and fats in one sitting, and maintain good sleep and activity levels. If fatigue after eating severely interferes with daily life, it may be worth consulting a healthcare provider to rule out any medical issues.