Hormonal
Higher urinary concentrations of specific phthalate metabolites (MBzP, MEHHP, MEOHP, MEP) are associated with increased waist circumference, and higher concentrations of MBP, MBzP, and MEP are associated with increased insulin resistance (HOMA) in adult U.S. males.
This study suggests that common environmental chemicals (phthalates) may contribute to belly fat and insulin resistance in men. While you can't eliminate all exposure, you can reduce it by avoiding plastic food containers, heating food in plastic, and choosing products with fewer fragrances (where some phthalates are found). However, focus primarily on proven factors: maintain a healthy weight, exercise regularly, and eat a balanced diet, as these have a much larger impact on your metabolic health.
In the adjusted model 1, increasing concentrations of MBzP, MEHHP, and MEOHP were statistically significantly associated with greater waist circumference, whereas concentrations of MBP, MBzP, and MEP were significantly associated with increased log HOMA.
Why this rating
The study is a large, nationally representative cross-sectional survey (NHANES) with rigorous statistical adjustment, but it cannot establish causality due to its observational nature.
Source
Concentrations of Urinary Phthalate Metabolites Are Associated with Increased Waist Circumference and Insulin Resistance in Adult U.S. Males
Richard W. Stahlhut et al. · Environmental Health Perspectives · 2007
DOI 10.1289/ehp.9882
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