In other words, the calories obtained from food exceed the calories taken in, and the excess calories are converted into fat, which accumulates in fat cells and forms obesity.

2. Diet leads to obesity

As a result of not paying attention to losing weight when I was a child, the human body produces too many fat cells, which will only increase after adulthood. It can be said that obesity has been foreshadowed since childhood.

3. Decreased metabolism leads to obesity.

After middle age, people tend to get fat because of the decline in metabolic rate; Unbalanced nutrition, eating only meat and junk food (food without nutrition) and not eating fruits and vegetables will also reduce the metabolic rate and make you obese.

Obesity is caused by heredity.

Family obesity is not necessarily genetic, but may also be related to your family's eating habits.

Extended data:

When people get old, there will always be some phenomena that hurt their self-esteem. One of the most frightening trends is that they are gaining weight. Because resting metabolism will slow down with age, and decrease by 1%-2% every 10 year.

At least for women, what is worse is a change before and after menopause: excess fat begins to accumulate. Instead of thickening thighs and buttocks, these fat meats began to pile a layer of swimming rings on their bellies. Of course, this phenomenon is more common in men.

This change is not just beautiful. Enlargement of the waist and buttocks indicates that the risk of heart disease, stroke, diabetes, metabolic syndrome and even some cancers will increase, which is the same for both men and women. This shift also helps to explain why women's cardiovascular risk begins to catch up with men after menopause.

A big belly can also cost people a lot. In 2008, a Danish study found that on the basis of a healthy waist circumference, every increase in waist circumference of 1 inch (2.54 cm) will increase the annual medical and health expenses of women by about 3%, while that of men will increase by 5%.

Researchers have been studying "middle-aged obesity" for decades. With the increase of age, more fat will accumulate around the abdominal organs, and most of the body fat is under the skin. However, there are some differences between different races. With a fixed waist circumference, African Americans have less "visceral fat" (visceral fat), while Asians have more.

The difference between visceral fat and subcutaneous fat is that the former will release fatty acids and inflammatory substances directly to the liver, rather than to the blood circulation. This mechanism may be directly related to abdominal obesity-related diseases.

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