Why Do Many People Get Sleepy After Eating Lunch?

Jakarta – Most people feel sleepy after a large meal in the afternoon. This can be a natural result of digestion patterns and sleep cycles. 

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Factors that may play a role include the type and amount of food a person eats. Some types of foods and the timing of meals can also make people feel especially tired after lunch. A decrease in energy levels after eating is called postprandial somnolence.

Researchers have different theories about the cause of tiredness after eating, but they generally agree that it’s a natural response and not usually a cause for concern. 

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Ilustrasi sedang makanan.

Photo :

• Pexels/Rachel Claire

Getting tired after lunch is relatively common. Someone may feel particularly tired, depending on what, when, and how much they ate. 

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Here are some reasons why someone might feel sleepy after lunch, and how to prevent it. 

1. Increased blood flow to the digestive system

After a lunch, blood flow increases to the digestive system to aid in the process of digesting food. This can lead to decreased blood flow to the brain, which can result in increased drowsiness.

2. Consumption of carbohydrate-rich foods

High-carbohydrate foods, especially those with a high glycemic index, can cause a spike in blood sugar followed by a sharp drop. This can make a person feel lethargic and sleepy. For example, eating foods high in simple sugars or refined flour can cause significant fluctuations in blood sugar levels.

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Ilustrasi konsumsi permen dan makanan manis berlebih

Photo :

• Freepik: wayhomestudio

3. Serotonin production

Foods rich in tryptophan, such as meat, poultry, and fish, can increase serotonin production in the brain. Serotonin is a neurotransmitter associated with feelings of comfort and relaxation, which can trigger drowsiness.

4. Low blood sugar

People often talk about a “sugar crash” after eating. But for most healthy people, the body is able to tightly regulate blood sugar levels by releasing just the right amount of insulin during a meal. So the idea of a sugar crash is mostly a myth.

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However, some people with underlying health conditions do experience a true drop in their blood sugar level after meals.