During the winter months, many people eat dinner later than they do during the rest of the year.
Workdays end in darkness, and family life and leisure activities push the meal further into the evening.
According to nutrition research, this shift may affect the body more than most people realize.
The body regulates sleep, digestion, and energy expenditure through a biological timing system that normally follows light and darkness.
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When daylight disappears earlier, the body becomes more sensitive to other signals, including when we eat.
What the research shows
Research into meal timing indicates that late dinners can place additional strain on the body.
A study published in The Journal of Clinical Endocrinology & Metabolism shows that people who eat late have higher blood sugar levels and burn less fat than those who eat earlier, even when the food and bedtime are the same.
A larger study published in JAMA Network Open also suggests that consuming more calories earlier in the day benefits metabolism.
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This is linked, among other factors, to lower blood sugar, blood pressure, and cholesterol levels.
Sleep and winter fatigue
In winter, many people get less daylight, which can affect mood and sleep.
When dinner is eaten close to bedtime, digestion remains active at the same time as the body is trying to wind down.
According to Videnskab.dk, this can lead to poorer sleep and increased fatigue.
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A realistic approach
The point is not that everyone should eat early. Activity levels, exercise, and everyday life play a major role.
Instead, research suggests that meal timing can be viewed as a flexible tool.
For some, an earlier dinner may lead to better sleep and more energy, while others need a later meal. Conscious choices are more important than fixed rules.
Sources: The Conversation, Videnskab.dk, and The Journal of Clinical Endocrinology & Metabolism.
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