Iron status and dietary iron intake in relation to overweight/obesity in U.S. adults: a nationwide population-based study.

ABSTRACT:

Background

Evidence on the associations between iron status biomarkers and both overweight/obesity prevalence and body mass index (BMI) is limited.

Methods

This cross-sectional analysis utilized data from 5,454 participants in the NHANES 2003-2006 and 2017-2020 cycles. Overweight and obesity were defined as BMI ≥ 25 kg/m² and ≥30 kg/m², respectively. Weighted multivariable logistic and linear regression models were used to assess associations between iron biomarkers, dietary iron intake, and overweight/obesity risk or BMI. Restricted cubic splines (RCS) were utilized to explore potential non-linear patterns. Furthermore, subgroup analyses stratified by categorical covariates were conducted.

Results

After adjusting for confounding variables, weigh

SUBMITTER: Lin Y 

PROVIDER: S-EPMC12548546 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature