A new study led by the University of Granada and published in the European Journal of Nutrition revealed that what you eat for dinner determines not only your sleep quality that night, but also the choices you make for breakfast the next morning.
Researchers explain the situation as follows: "Dinner affects sleep, while sleep shapes breakfast habits the next day".
Rather than a one-sided relationship between nutrition and sleep, the study points to a two-way interaction that constantly nourishes each other.
WHY DOES DINNER AFFECT SLEEP?
One of the main findings of the research is that the nutritional content of dinner is directly linked to the quality of sleep that night.
According to the researchers, consuming high-calorie, fat, cholesterol and protein meals, as well as alcohol, red meat or fried foods, was associated with lower sleep quality.
Dinners rich in carbohydrates, olive oil and oily fish have been observed to provide better rest.
SLEEP ALSO SHAPES EATING HABITS
This relationship also works in the opposite direction: Sleep quality affects what we eat the next morning. The data reveals these interesting patterns:
Waking up later is associated with higher calorie intake for breakfast
• More fragmented sleep is linked to higher sugar consumption and lower fiber intake,
• Longer sleep time is associated with better nutritional quality at the first meal of the day.
These results reinforce the idea that sleep is not only a result of diet, but also a factor that conditions subsequent dietary choices.
A CYCLE REPEATED EVERY DAY
The most important contribution of the research is that it shows how tightly dinner, sleep and breakfast are interconnected as part of daily life. This trio creates a seamless cycle in which a small change in one area affects the others.
Experts believe these findings could help focus future obesity prevention and treatment strategies not only on "what to eat", but also on "when to eat" and "how to sleep".