Why You Lose Your Appetite in Hot Weather: Scientists Explain the Biology Behind It

How High Temperatures Affect Hunger Signals

According to НВ — Техно: June 25, 08:00

MedicalXpress

When temperatures soar, a drop in appetite is a natural physiological response driven by the body's cooling system and hormonal shifts. The human body maintains an internal temperature of around 37 °C, with the hypothalamus acting as the main thermostat. In hot conditions, blood flow shifts away from the intestines and toward the skin to release heat, which can directly dampen hunger cues.

Nutrition Tips for Hot Days

Digestion is an energy-intensive process that generates internal heat. To prevent overheating, the body may reduce levels of ghrelin-the hormone responsible for triggering hunger-while increasing hormones that promote fullness. The hypothalamus, which regulates both hunger and thirst, can also slow down stomach emptying during heat waves, further curbing the desire to eat.

Doctors advise switching to smaller, more frequent meals during hot spells. This approach prevents overtaxing the digestive system and minimizes heat production. Recommended foods include:

• Water-rich items like fruits, vegetables, and fermented dairy products;
• Avoiding heavy meals high in protein and carbohydrates, as these generate the most heat during digestion.

This article provides general informational content and should not be considered a substitute for professional medical advice. NV is not liable for any diagnosis made by readers based on site materials. NV also assumes no responsibility for the content of external websites linked in this article. If you have health concerns, consult a doctor.

Understanding how heat influences appetite is key to maintaining a healthy lifestyle during the summer months. Changes in eating patterns can be more than just uncomfortable-if ignored, they may affect overall well-being. Proper nutrition in hot weather helps optimize energy use, prevent overheating, and ensure the body gets essential nutrients.

As the heat impacts your appetite, it's equally important to consider how it affects physical activity. Staying active during hot weather requires careful planning to avoid heat-related issues. For expert recommendations on maintaining safety while exercising in high temperatures, check out this insightful article on safe exercise practices.