Weight gain in your 20s linked to earlier death
Researchers looking at more than 620,000 people found that gaining weight during your 20s is tied to a higher risk of premature death later in life. (foxnews.com)
Body weight is not just a snapshot; this study found the timing of weight gain matters, and the biggest long-term risk showed up when obesity began before age 30. (thelancet.com) Researchers at Lund University analyzed weight records for more than 620,000 people in Sweden between ages 17 and 60, using participants who had at least three measured weights from sources such as military conscription, early pregnancy, or research studies. (lunduniversity.lu.se) They reported that people who developed obesity between ages 17 and 29 had about a 70% higher risk of premature death than people who did not develop obesity before age 60. Men and women in the study gained an average of 0.4 kilograms, or about 0.9 pounds, per year. (sciencedaily.com) The paper tracked deaths from all causes and from obesity-related diseases, not just whether someone was heavy at one doctor visit. During follow-up, 86,673 men and 29,076 women in the study died. (lunduniversity.lu.se) Obesity means having a body mass index of 30 or higher, a height-and-weight measure doctors use as a screening tool rather than a direct measure of body fat. In this study, “obesity onset” meant the first time a participant’s body mass index reached 30. (sciencedaily.com) The researchers said earlier weight gain may do more damage because the body is exposed to excess weight for more years. First author Huyen Le said longer exposure to the biological effects of excess weight is one possible explanation for the higher risk. (lunduniversity.lu.se) That fits with what health agencies already say about obesity: the National Institute of Diabetes and Digestive and Kidney Diseases lists type 2 diabetes, heart disease, stroke, and some cancers among the conditions linked to overweight and obesity. (niddk.nih.gov) The backdrop is a broader rise in obesity. The Centers for Disease Control and Prevention said in September 2024 that 23 states had adult obesity prevalence above 35% in 2023, and every state was above 20%. (cdc.gov) The study was observational, which means it found a link rather than proving that weight gain in your 20s directly causes earlier death. The authors said future work should add richer data on confounding factors and on body fat distribution and muscle mass. (thelancet.com) The finding does not say every pound gained in your 20s is fatal; it says earlier obesity tracked with higher mortality across a very large cohort. The paper’s conclusion was narrower and more specific: weight gain in adulthood, especially young adulthood, and obesity onset before age 30 were strong risk factors for death from multiple noncommunicable diseases. (thelancet.com)
