The lack of sleep adds to the desire for junk food and, if there is no rest, increases the risk of obesity, a study by the Neuroscience Magazine.
Research conducted by scientists at universities in Columbia, Germany, Julia Rihm and Jan Peters, combines endocrinology behavioral economics.
"Approaching our data approaches our lack of sleep compared to our food assessment," explains Peters.
Specifically, the study analyzes how fatigue can cause brain diseases in appetite, as well as appetite hunger hormones.
The researchers gathered 32 young men from 19 to 33 years old and donated pasta and loin to dinner with an apple and a strawberry yogurt.
Afterwards, the participants were divided into two groups: they went home with a device that recorded the sleep time and others worked in the laboratory for a variety of activities throughout the night, so they did not sleep.
The next day, they tested the hormones that linked blood sugar and appetite. In addition, junk food images, such as chocolates and hats, were presented in a game that could not be consumed, so how much they would have to pay to be evaluated at a scale of zero to three euros.
According to the results, the lack of sleep caused the subjective value of non-food foods and increased neuronal imagery in tonsill, a circuit that controls the behavior of rewards and the hypothalamus, associated with hunger.
"Because of these data, there is a risk of lack of rest and obesity," said Rihm.