Obesity

Target tissue insulin resistance in early and late onset of overweight or obesity

Int J Obes (Lond)Published Cross-sectional study

Authors' 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.

Study context

Population
Adults with information on body mass index (BMI) at 18 years of age
Participants
339 adults
Exposure
Early vs late onset of overweight/obesity vs never overweight
Outcome
Target tissue insulin action: HOMA-IR (liver), hyperinsulinemic euglycemic clamp (skeletal muscle), Adipo-IR (adipose tissue), insulin action on lipogenesis (fat cells)

Main finding

As reported in the abstract

Insulin resistance, EO vs LO
After correction for current BMI or age, no significant differences between EO and LO for any measure of insulin action
p ≥ 0.08

Observational data: associations, not effects.

Further findings

BMI and age at examination, EO vs LO

EO had 5 kg/m² higher BMI and was 10 years younger than LO (p < 0.0001)

Correlation of BMI with insulin resistance measures, all subjects

Current BMI correlated with insulin resistance measures
P < 0.0001
BMI at 18 years did not correlate with insulin resistance measures
P ≥ 0.13

Original publication

Target tissue insulin resistance in early and late onset of overweight or obesity. Int J Obes (Lond). Published 2 July 2026. doi:10.1038/s41366-026-02146-8

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