Why do some people say that sleeping with the light on will make you fat?

Research shows that turning on the light at night is easy to get fat, even if the light is weak, the human body will be affected, even if the diet is balanced, active exercise is inevitable. Because the night light will disturb the circadian rhythm of the human body, causing black and white to be reversed, eat it at night when it should not be eaten. Bright lights stimulate appetite and make people eat before going to bed, but food is difficult to digest when sleeping and usually turns into fat, which leads to obesity.

Researchers say that night lighting can make experimental mice gain weight quickly. During the eight-week study, compared with the experimental mice in the dark environment at night, the experimental mice in the light environment at night gained 50% weight. All the experimental mice had the same amount of food and food. The difference is that mice exposed to light at night eat 55% more during the usual rest period.

Night lighting will disturb the circadian rhythm of human body, resulting in black and white inversion. Eating at night when it is not appropriate will lead to obesity. Night lighting includes not only turning on the lights, but also the weak light generated by TV or computer. Therefore, no matter how strong the night light is, as long as there is light, it may increase the probability of obesity. And turning off the lights at night helps to lose weight.

There are two kinds of fat in human body: brown fat and white fat. Brown fat is responsible for decomposing white fat that leads to obesity, converting the latter into carbon dioxide, water and heat, and does not store heat itself. White fat accumulates under the skin and is responsible for storing excess calories. Turning on the light at night will interfere with brown fat, leading to fat accumulation in the body, leading to obesity.

Too bright light during sleep will also interfere with the secretion of two hormones: one is "satiety hormone", which is easy to make people feel full and not easy to eat too much; The other is "hunger hormone", which makes people feel hungry and stimulates people to find food to eat. However, studies have shown that lack of sleep will lead to a decrease in the level of "satiety hormone" and an increase in the level of "ghrelin", which will make people eat more and become fat. This is also one reason why turning on the light when sleeping will make you fat.