Does Weight Affect Lifespan? Following up more than 4,000 people in 1973, scientists found that “slightly fat” is just right

With the development of social economy and the improvement of people’s lives, there are more and more obese people around.

The “Dietary Guidelines for Chinese Residents 2022” pointed out that the overweight rate of residents over the age of 18 in my country reached 34.3%, and the obesity rate reached 16.4%, which shows that obesity is becoming more and more common.

As the saying goes, “Money can’t buy old age and thinness”. Obviously, in the consciousness of most people, obesity is not good after all, especially the elderly, who seem to be thin A little bit is more beneficial to health. But is this really the case?

1. 4576 people were followed up in 73 years, and the risk of premature death was lower for “old and fat”

In recent years, Ohio State University has published a study on “ANN EPIDEMIOL”. They have followed up 4,576 volunteers for 73 years since 1948, considering gender, marriage, medical history and many other indicators. Under the study, it was found that people who had a normal weight when they were young and became overweight in later life had a lower risk of premature death.

Belgian mathematicians use body mass index (BMI) to evaluate people’s obesity, and think that the value is between Between 18.5 and 23.9 is standard, less than 18.4 is underweight, between 24 and 27.9 is overweight, and a value above 28 is called obese. From the above research, it seems that “old and thin” is not a good thing.

Not only that, but some scientists have found that based on the research of hundreds of thousands of elderly people, the relationship between human life expectancy and health presents a “U”-shaped curve. Being thin in old age may increase the risk of premature death by 10%, and being overweight may also increase the risk by 8%. The BMI value of the long-lived elderly is not in the standard range, but stabilizes at around 25, which is the so-called slightly fat.

Therefore, based on the aforementioned lengthy study of large populations, researchers agree that body weight affects human The life expectancy, and slightly fat is just the right state.

2. Entering middle age, the aging rate of skeletal muscle is accelerated by 8% per year

Why is it that the elderly are healthier if they are slightly obese? Scientists explain it this way. Compared with young people, the elderly have poorer metabolic capacity in their bodies. If they eat like young people, they will not be able to absorb nutrients in their bodies, and their bodies will become thinner. Therefore, if they absorb enough nutrients, they will appear in a “slightly fat” state.

Moreover, after a person enters middle age (40 years old), the annual rate of skeletal muscle attenuation accelerates by 8%, and it doubles after the age of 70. Therefore, after the age of 40, many people begin to lose weight, shrink in muscle mass, lose the athletic ability of their youth, and are prone to falls.

In order to improve this situation, you can generally try a “Mediterranean” diet plus muscle training. Of course, scientists have also discovered that a “Wright” substance has potential in this regard through mitochondrial empowerment. It is reported that this substance is actually a precursor, which can increase the content of an important endogenous substance after entering the human body, thereby positively intervening in various aging-related indicators, and even prompting the body to show youthful changes.

In the biotechnology investment of 95-year-old Hong Kong billionaire Li Chaoren and 92-year-old stock god Buffett, we can also see the figure of the above-mentioned technologies. In fact, they are also their own demonstrations By. Now, with the maturity of domestic quantification technology, “Wright” has been made available to everyone to a certain extent, and it has been lowered through mainstream online shopping platforms. However, the four-digit cost still seems a bit unfriendly to many families.

3. Although “slightly fat” is good, stable weight is also very important

weight Although it affects lifespan, obesity in particular increases the risk of many related diseases. The relationship between body weight and life expectancy is not only “slightly fat”, but also the relative stability of body weight.

How do you understand it? Just don’t let your weight suddenly become obese or thin in a short period of time. No matter the change, there should be a gradual process.


Moreover, studies have found that after the age of 25, the decline in the body’s basal metabolism will have a direct impact on body weight. It is normal and appropriate to change within a range of about 5%.

For the elderly, sudden weight loss may affect normal gastrointestinal function and immunity, etc. , a sudden increase in weight will increase the possibility of diabetes. Therefore, the weight status of the elderly has a greater impact than that of the young, and it deserves more attention.

Finally , whether it is through exercise or dietary intake, weight intervention must be just right. It is not advisable to be overweight or underweight, and a little fat is just right.