Why do some people never get fat? Experts say it has nothing to do with body type or metabolism.

Beijing time on August 4, according tomedia reports, why do some people eat whatever, will not become fat? This seems to be one of the most unfair things in life: some people have to eat food carefully for fear that they will gain weight, while others will enjoy foods such as doughnuts and achieve the same weight loss. What’s the secret? How do some people do not gain weight?

Why do some people never get fat? Experts say it has nothing to do with body type or metabolism.

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“The answer is complex, and nutrition, genes, and even behavioral factors all affect weight loss, and these factors don’t play exactly the same role in different individuals,” said Catherine Melanson, a professor of nutritional food science at the University of Rhode Island. “

The most important thing is that weight loss has nothing to do with body type or metabolism, And Melanson points out that many people seem to eat a lot of their favorite foods but don’t get fat, but they don’t actually eat more than we do. For example, if your friend eats ice cream every day, he may choose to cut back on meals or control snacks to offset the calorieins, or when they eat staples such as pizza, they eat slowly, creating a satiety in a short period of time, which can achieve a small amount of food.

If you regularly look at the number of calories these people eat, they may not eat as much food as you think. Dr. Frank Greenway, chief medical officer at the Pennington Biomedical Research Center, says people’s eating habits vary from person to person, with some people eating little but eating only high-calorie foods, while others may find it difficult to avoid overeating.

Daily physical activity can have a significant effect, but not necessarily in the gym, Melanson said: “Some people just exercise a lot, even if they’re not necessarily athletes, for example: they may be restless or paced in their spare time, or they have a regular outing or run around with their kids all day.” There is even evidence that some groups are born with ‘exercise genes’ and that they don’t usually sit down at all. “

Extra physical activity also speeds up the body’s metabolism, which is the amount of energy the body consumes in a day that does n’etre, excluding exercise. The more exercise you exercise, the more the number and activity of the inner granules in your muscle cells increases, and these are “power plants” that create energy and use energy for movement. The more mitochondria, the more calories you burn.

Dr Ines Barroso, an expert at the University of Cambridge who studies the genes of obesity in the human body, points out that there is no evidence so far that some people are born to burn a lot of calories without exercise. However, there may be physiological differences that allow some people to naturally regulate their calorie intake without self-restraint. Nervous system signals and hormone cascade reactions circulating in the body’s blood tell us when to be hungry, or when to feel full, which is known as the appetite regulation system. The appetite regulation system varies from group to person, and the system is usually insensitive to overeat, and the sensitive person will control the eating in a timely manner.

The appetite regulation system involves an important hormone, leptin, which helps regulate how much food the body wants to eat over a longer period of time, not just the next meal. As a result, people with sensitivity to the appetite regulation system are full when they eat one-third or one-half of the food at a party and may eat less over the next few days. The appetite regulation system simply automatically adjusts the body’s energy balance, and some appetite signals: “Okay! We’ve got plenty of food energy! “

The trend of a person’s weight gain or decrease is closely related to genes, and according to a 2019 study published in the Public Library of Science Genetics, scientists found that more than 250 AREAS of DNA were associated with obesity, comparing the health of 1,622 healthy people with a low body mass index (BMI), 1985 severely obese people and 10,433 people with normal weight, and found that those who were thin had very few genes associated with obesity.

‘Genes don’t determine people’s weight, and we don’t find genes that specifically protect people from obesity or cause obesity, which seems to be a continuum, with some people having genes that determine body obesity, but their size is normal,’ said Barroso, a co-author of the new study.

The final answer is complicated: our tendency to gain or maintain weight is not predetermined, but it’s not entirely under our control, there’s no genetic switch that allows some people to eat their favorite foods without gaining weight, and the tendency to gain weight isn’t necessarily due to a lack of self-control, and everyone’s situation is different.