Key result
Early-onset obesity shows no difference in insulin resistance compared to late-onset obesity.
Why the study?
Does the time of onset of overweight or obesity affect the level of insulin resistance in different target tissues?
Cross-Sectional (n=339)
Does the time of onset of overweight or obesity affect the level of insulin resistance in different target tissues?
Current BMI, rather than the age of onset of overweight or obesity, is the primary determinant of insulin resistance in target tissues.
Background/Objective Overweight and obesity are associated with insulin resistance. However, the importance of the time of onset of excess body fat is unknown and was presently examined. Subjects/Methods We included 339 adult participants having information about their body mass index (BMI) at 18 years of age. Insulin action was determined as homeostasis model assessment (HOMA-IR) reflecting liver, hyperinsulinemic euglycemic clamp reflecting skeletal muscle, Adipo-IR reflecting adipose tissue in vivo, and insulin action on lipogeneses reflecting fat cells. The subjects were divided into never having overweight/obesity with BMI always <25 kg/m 2 (NO), having BMI ≥ 25 kg/m 2 already at 18 years of age (EO), and late onset of overweight when BMI was ≥25 kg/m 2 only at current examination (LO). The groups were compared by unpaired t -test and single and multiple regression analysis (the latter to study the influence of other factors than insulin action). Results EO had 5 kg/m 2 higher BMI and was 10 years younger than LO at examination ( p < 0.0001). EO was more insulin resistant than LO for both HOMA-IR and Adipo-IR, but not clamp ( p = 0.01, 0.02, and 0.11, respectively). However, when the different measures of insulin resistance were corrected for current BMI or age there were no significant differences between EO and LO for any of the measures of insulin action ( p ≥ 0.08). Furthermore, in all subjects current BMI ( p < 0.0001) but not BMI when 18 years old ( p ≥ 0.13) correlated with different insulin resistance measures. Conclusion When current BMI or age is considered, there is no difference between early or late onset of overweight/obesity for the level of insulin resistance in the different target tissues of the hormone.
No takes yet. Share an insight, caveat, or question.
Zadruzny et al. (2026) conducted a cross-sectional in Overweight or obesity (n=339). Early onset of overweight or obesity vs. Late onset of overweight or obesity was evaluated on Insulin resistance measured by HOMA-IR, Adipo-IR, hyperinsulinemic euglycemic clamp, and insulin action on lipogeneses (p=≥0.08). Early onset of overweight or obesity did not significantly differ from late onset in insulin resistance across target tissues when adjusted for current BMI or age (p ≥ 0.08).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:
More from International Journal of Obesity