The study found the relationship between weight and life expectancy. After the age of 60, don't compete with your weight. It is actually better to be 'slightly fat'
Xiaoling is 35 years old this year and is a proper foodie. What makes many people envious and jealous is that although Xiaoling eats a lot, she doesn't get fat no matter how much she eats. The more she eats, the slimmer she becomes . She often goes to dinner with her colleagues at work. Because she eats a lot, her male colleagues joked, "Aren't you afraid of gaining weight if you eat so much?"
Xiaoling is also careless, and responds every time, "I belong to the physique that eats only and doesn't gain weight, don't envy me."
Who knows, one morning Xiaoling woke up and found that she was weak, and when she looked in the mirror, she felt a lump on her neck. She went to the hospital for an examination and found out that it was hyperthyroidism.
After listening to the doctor's explanation, Xiaoling realized that the "culprit" that she didn't gain weight from eating alone was hyperthyroidism!
1. Why do some people not gain weight no matter what they eat?
I don’t know if you have such friends around you. When you go out for dinner, no matter how much you eat, you will not gain weight, but you will gain weight if you drink saliva... Why is there such a big difference between people?
A study published in Science Advances by Yale University in the United States found that lipid metabolism in hypothalamic astrocytes plays a decisive role in the susceptibility to diet-induced obesity .
Specifically, astrocyte-specific knockdown of Angptl4 prevented high-fat diet-induced changes in the mitochondrial morphology of hypothalamic astrocytes and increased the perinuclear glial surface layer of POMCs, preventing diet-induced of obesity.
Conversely, astrocyte-specific deletion of Pparγ exacerbates susceptibility to high-fat diets, alters hypothalamic circuit integrity, hyperphagia, and weight gain.
Of course, not only eating but not getting fat is related to the brain, but also related to genes, high basal metabolism, poor gastrointestinal absorption, fast digestion, too much activity and other factors.
It should be noted that if the situation of "eat light but not fat" suddenly appears, one needs to be alert to the possibility of disease.
Especially hyperthyroidism, diabetes, and digestive system diseases such as irritable bowel syndrome, indigestion, and chronic enteritis, and even cancers such as liver cancer and gastric cancer.
2. Obesity comes from "eating"? 3 reasons are also accomplices
Some people say that obesity is caused by eating, and the main reason is not being able to control one's mouth.
In fact, obesity can be divided into simple obesity and secondary obesity. Among them, simple obesity accounts for about 99%, and the etiology is not yet clear, which may be related to factors such as genetics, diet, and exercise; secondary obesity is relatively small, accounting for about 1%, and refers to obesity caused by other diseases.
Theoretically speaking, obesity is a state caused by excessive accumulation of body fat, which is mostly related to excessive food intake or changes in body metabolism .
But in fact, the reasons for obesity are not so simple. At present, many studies have found that human obesity may also be related to the following factors:
1. Intestinal flora
A study published in The Lancet Diabetes and Endocrinology found that Ruminococcus in the gut microbiota was associated with multiple metabolic syndrome features, and that body mass index and C-reactive protein had no effect on Ruminococcus, and there was no reverse causality .
2. Brain disease
Obesity is a neurodevelopmental disorder with molecular mechanisms underlying early brain development, according to research published in the journal Science Advances by Baylor College of Medicine. May be a major determinant of obesity risk.
3. There are too many private cars in China
A study published in the "British Medical Journal" by the University of California, Berkeley and Renmin University of China found that the increase in Chinese car purchases is an important reason for obesity. The researchers pointed out that car ownership reduces physical activity, which contributes to weight gain.
3. Weight determines life expectancy? This weight is healthier
Weight not only affects appearance, but also determines your lifespan.
A study published in the Annals of Epidemiology by Ohio State University conducted a 73-year research survey on 4,576 participants.
The results found that people who maintained a normal weight when they were young, and people who were slightly obese when they were old (after 60 years old) had a lower mortality rate .
In addition, many studies have also shown that there is a significant relationship between body weight and mortality, and being slightly obese is a more appropriate physiological state.
The reason is that with age, the body's metabolic capacity is getting worse and worse, unable to fully absorb nutrients, it is easy to lead to malnutrition, thin body, affect normal physical activities, and increase the risk of disease. On the contrary, people with normal nutrient absorption are slightly fatter and have stronger immunity.
So, what is the longest life weight? Scientists believe that the healthiest body mass index (BMI) for the elderly is 25-29 , where BMI=weight (KG)/height (M)².
According to the definition of WHO, BMI 18.5-24.9 is normal, BMI 18.5 < is underweight, BMI ≥ 25 is overweight, and BMI ≥ 30 is obese.
With the improvement of living standards and changes in lifestyles, more and more people are facing the crisis of overweight and obesity. Being too fat has no health benefits, it only increases the risk of chronic diseases and shortens life expectancy.
Therefore, if you want to live a healthy life, you must remember: eat until you are 70% full, eat a variety of foods, and exercise reasonably.
References
[1] "Weight Determines Lifespan? Which Body Type Lives Longest? If you want to live to ninety-nine, the key is not to do these 5 things.” Popular Science China. 2022-05-11
[2] "Stop losing weight blindly! It took 73 years for scientists to discover that "slightly fat" people live longer! ". Health Times. 2021-11-17
[3] "The Lancet" sub-journal reveals: Gut flora really affects obesity? ". New Perspectives in Medicine. 2022-07-14
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