The Real Reason You Want More Carbs in Winter — The Science Behind Seasonal Hunger

A new study reveals how seasonal changes affect the metabolism of Israelis. Conducted by the company Lumen, the research analyzed data from 8,000 users and found significant differences between winter and summer in the body’s metabolic function.

According to the findings, the body burns more carbohydrates in the winter, while in the summer it shifts towards burning fats. Dr. Meirav Mor, one of Lumen’s founders, explains: “In the winter, the body relies on carbohydrates to maintain warmth, whereas in the summer, thanks to the higher temperatures, it prefers using fats as an energy source.”

The data shows that Israelis consume an average of 115.9 grams of carbohydrates per day in the winter—a 20% increase compared to summer, when the average is 96 grams. The study suggests that winter-related appetite shifts and a greater craving for carbohydrate-rich foods explain this increase.

The study also found that Israelis tend to walk more in the winter, averaging about 8,200 steps a day compared to 7,000 in the summer. Sleep duration, however, remains consistent throughout the year, at roughly 7.5 hours per night.

The Importance of Sunlight Exposure

The research highlights the role of sunlight exposure during summer months, which boosts vitamin D production and supports metabolic processes. In the winter, colder temperatures and shorter days may reduce motivation for physical activity and influence dietary habits.

Overall, the study underscores the importance of adjusting nutrition and physical activity to the season in order to maintain optimal metabolic health year-round.