And US researchers say that the reductions in BMI between the ages of 25 and 40 are critical to living a long life.
Excess fats usually lead to cardiovascular disease, cancer, diabetes, and even “Alzheimer’s”.
According to the study published in the scientific journal “Gamma Network”, the researchers sought to perform the study data from 24,205 participants from the National Health and Nutrition Examination Survey, during the period from 1998 to 2015.
The age of the participants when entering the study was between 40 and 74 years old, and at this stage their body mass index was taken, and the body mass index of all participants, who were selected for the study at the age of 25, were taken.
The researchers added the link between changing BMI and the likelihood of a participant dying, over the course of the controlled period, and controlling other factors such as sex, education level and whether or not they smoked.
The researchers found that the participants whose body mass index (BMI) moved from the “obesity” range at the age of 25 to the “overweight” range in middle age, were 54% less likely to die than the participants whose body mass index remained in the “obesity” range.
Participants who switched from “obesity” to “overweight” were at a greater risk of death than participants whose BMI was in the “overweight” range all the time.
It was noted that there was no significant reduction in the risk of death for participants who lost weight in old age, because losing weight during this period is likely to be associated with deteriorating health of an elderly person.