Harm of turning on the light to sleep:

1, making people fat

Exposure to light at night will change the hormone level and circadian rhythm of the human body and increase the risk of obesity.

A survey of 43,722 women aged between 35 and 74 by the National Institutes of Health shows that women who are used to sleeping with the lights on at night have an increased probability of gaining more than 5 kilograms after five years 17%.

Growth hormone is secreted by the pituitary gland of the brain at night. Generally, in the first half of sleep, if there is light when staying up late or sleeping, it will affect the secretion of growth hormone, which will lead to obesity.

In addition, there are two kinds of fat in the human body, brown fat and white fat. White fat stores excess heat, and brown fat is converted into heat by decomposing white fat. Turning on the light to sleep at night not only interferes with the body's biological clock, but also interferes with brown fat, which makes the body fat aggregate and obese.

2. precocious puberty in children

Light stimulation can inhibit the secretion of melatonin by the pineal gland, which inhibits gonadal development, so the habit of sleeping with the light on can easily lead to precocious puberty in children. The tragedy of children's precocious puberty caused by turning on the light to sleep on the Internet can be seen everywhere.

3, easy to grow taller

In the case of adequate nutrition supply, it is growth hormone that determines the speed and duration of a person's height growth. The peak period of growth hormone secretion during sleep is from 10 to 2 am.

If the baby doesn't sleep at this time, it will affect his own growth hormone level. Therefore, it is easy for us to find that people who didn't get enough sleep when they were young are often shorter.

4, affect vision development

Even with our eyes closed, we can still feel the stimulation of light. When turning on the light to sleep, the eyeball and ciliary body are always stimulated by the light source, which will affect the baby's vision development and increase the risk of myopia. Adults sleep with the lights on, and their eyes don't get enough rest, which easily leads to eye fatigue and myopia.

5. It is easy to lead to infirmity.

Being in a low-quality sleep state for a long time will affect the body function, lead to abnormal body temperature, heartbeat, pulse and blood pressure, and cause adverse consequences such as loss of appetite, depression and even weakness.