A specialist in internal medicine, Dr. Olga Sevaeva, reported that drowsiness after eating is caused by a sudden increase in blood glucose and insulin levels. She notes that feeling sleepy after lunch is physiologically normal, but in some cases, it may indicate a metabolic disorder. The desire to rest after a meal is due to the body redirecting its resources toward digestion and actively producing insulin. In particular, fast-digesting carbohydrates cause drowsiness because they lead to a sharp spike in blood glucose and insulin secretion. Furthermore, the production of orexin, a hormone responsible for energy, decreases after eating, which is especially noticeable in people with insulin resistance and hypothyroidism. To overcome this condition, the doctor advises reducing portion sizes, replacing fast-absorbing carbohydrates with complex ones, and adding protein and fiber to the diet to slow down sugar absorption. If drowsiness persists, an insulin level check should be performed. A short walk after eating is also beneficial, as even 5-10 minutes outdoors can help invigorate the body. She explained that during this time, blood flows to the stomach and intestines, reducing blood flow to the brain and causing slight lethargy.
