Why Do We Feel Sleepy After Eating?

Tuesday, July 21, 2026

SAEDNEWS: Feeling sleepy after eating is common, and research shows that various factors contribute to this condition.

Why Do We Feel Sleepy After Eating?

According to SAEDNEWS, Feeling tired after eating is a natural phenomenon that most people experience occasionally. However, if this fatigue interferes with your daily activities, it is best to consult a doctor, as it could be a sign of an underlying health problem.

What Causes Fatigue After Eating?

Researchers have identified several factors that may contribute to the desire to sleep after eating. These factors include:

  • The food you eat: Foods that are high in carbohydrates or fats are more likely to make you feel tired compared to meals that are rich in protein.

  • The amount of food you eat: Consuming a large number of calories in one meal is also associated with post-meal fatigue.

  • Meal timing: The timing of meals can affect energy levels.

  • Specific nutrients: Research suggests that tryptophan, melatonin, and certain other compounds may contribute to sleepiness.

Which Foods Can Make You Feel Tired?

The nutrients found in some foods can make you feel tired after eating. Consuming these foods before bedtime may help you get a good night’s sleep. However, eating them for lunch may make you feel like taking a nap at your desk. Below are some fatigue-inducing nutrients and the foods that contain them.

Melatonin

Melatonin is a hormone that the brain produces in response to darkness. It helps relax the mind and body and can make you feel sleepy. Melatonin is also found in many foods and may contribute to reduced energy levels after eating.

Foods that contain high amounts of melatonin include:

Barley, Corn, Cucumber, Eggs, Mushrooms, Oats, Pistachios, Rice, Salmon, Strawberries, Cherries, Wheat.

Tryptophan

Tryptophan is an amino acid that may cause feelings of sleepiness. The body converts tryptophan into serotonin and then into melatonin, which, as mentioned earlier, can lead to feelings of fatigue.

Foods rich in tryptophan include:

Chicken, Egg whites, Fish, Milk, Sunflower seeds, Peanuts, Pumpkin seeds, Sesame seeds, Soybeans, Turkey.

sleeping

Carbohydrates

Research shows that foods high in carbohydrates can contribute to feelings of tiredness. In general, foods with a high sugar index or glycemic index (a measure of how quickly a specific carbohydrate raises blood sugar levels) are more likely to cause fatigue after a meal.

Experts believe that fluctuations in blood sugar levels play a role in post-meal fatigue. The body converts carbohydrates into sugar. Foods with a high glycemic index can cause blood sugar levels to rise quickly and then drop. This decrease in blood sugar may make you feel sleepy after eating.

Some high glycemic index foods include:

  • Baked goods such as bread

  • Cereals such as cornflakes and instant oatmeal

  • Potatoes

  • Sugar (sucrose)

  • Watermelon

  • White rice

Fats

High fat intake is associated with increased fatigue throughout the day. However, studies show that the type of fat also matters. In particular, saturated fats and trans fats are linked to greater fatigue after eating.

Some foods that contain unhealthy fats include:

Baked products and processed baked goods, Beef, Butter, Cheese, Cream, Dark-meat poultry, especially with the skin, Fried foods, Ice cream, Lamb, Palm oil and palm kernel oil, Full-fat dairy products.