Why are we tired after a certain meal

Why are we tired after a certain meal?

Feeling tired after eating, often called “food coma” or medically “postprandial somnolence,” is a completely normal phenomenon caused by several factors.

The main reasons are related to what and how much we eat, and how the body digests the food.

Key reasons why we feel tired after a certain meal:

Blood flow diversion

After a meal, the body directs a greater portion of its energy and blood to the digestive system in order to digest the food we have eaten. As a result, blood flow to the brain and other parts of the body is reduced, which can cause a feeling of fatigue and drowsiness. The larger and heavier the meal, the more energy the body needs to digest it, which is why fatigue is especially noticeable after a large lunch or dinner.

Blood sugar fluctuations

• Meals rich in carbohydrates and sugar: Foods with a high glycemic index, such as white bread, pasta, pastries, and sugary drinks, cause a rapid rise in blood sugar. The body responds by releasing insulin, which quickly lowers blood sugar. This rapid drop in blood sugar after a high can cause a sudden drop in energy and fatigue.

Hormone Action

• Serotonin and Melatonin: Certain foods, especially those high in protein, contain the amino acid tryptophan. This substance stimulates the brain to produce serotonin, a neurotransmitter associated with feelings of relaxation and well-being. Serotonin, in turn, is a precursor to melatonin, a hormone that regulates sleep. This is why we may feel sleepier after a meal rich in tryptophan (e.g. turkey, eggs, cheese).

General Factors

• Meal Size: The larger the meal, the more energy the body uses to digest it, which causes greater fatigue.

• Lifestyle: If you don’t get enough sleep or are already generally tired, fatigue will be even more pronounced after a meal.

How to prevent post-meal fatigue:

• Balanced meals: Eat smaller, more frequent meals that are balanced with protein, healthy fats, and complex carbohydrates.

• Food choices: Choose whole grains over refined carbohydrates, which release energy slowly and steadily.

• Hydration: Drink plenty of water to support digestion.

• Exercise: Take a short walk after eating, as this stimulates digestion and circulation and helps maintain energy.

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