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Dose-dependent association of prenatal microplastic exposure with gestational diabetes Mellitus: A prospective cohort analysis
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A study of 770 pregnant women found that those with the highest exposure to microplastics, tiny plastic particles from everyday products, were more than twice as likely to develop gestational diabetes compared to those with the lowest exposure. Surprisingly, makeup and personal care products (like lotions and cosmetics) showed a stronger link to this risk than diet did, suggesting what touches your skin may matter as much as what you eat. While this research shows an association rather than proof of direct cause, it points to a possible new, modifiable risk factor worth watching during pregnancy.
BACKGROUND: This study aimed to elucidate the potential crosslink between microplastic exposure and the development of Gestational Diabetes Mellitus (GDM) in primiparous pregnant women. METHODS: Prospective cohort study, involved 770 pregnant women. Data on demographic factors and microplastic exposure assessed through a validated Microplastic Exposure Questionnaire (MEQ) were collected, focusing on exposure via cosmetics, toiletries, and food. Participants were categorized into low (≤ 113), moderate (114-142), and high (≥ 143) exposure groups based on quartile-derived thresholds (Q1 = 113, Q3 = 142). Content Validity index and Cronbach's alpha reliability test were performed to ensure the reliability and validity of the questionnaire. Primary outcome assessed for the incidence of GDM. RESULTS: The Cronbach's alpha value was 0.835, indicating good internal consistency. Scale Content Validity Index (S-CVI/Ave) results indicated that the questionnaire has moderate to strong content validity. Among the 770 participants, 289 (37.5%) were diagnosed with GDM, while 481 (62.5%) were non-GDM. Exposure distribution revealed 202 women with low exposure (74 GDM, 128 non-GDM, 36.6% GDM prevalence), 380 with moderate exposure (110 GDM, 270 non-GDM, 28.9% GDM prevalence), and 188 with high exposure (105 GDM, 83 non-GDM, 55.9% GDM prevalence). Chi-square analysis indicated a significant association between microplastic exposure category and GDM status (χ² = 38.92, df = 2, p < 0.001). Binary logistic regression demonstrated that high exposure significantly increased GDM risk compared to low exposure (OR = 2.19, 95% CI: 1.46-3.28, p < 0.001), whereas moderate exposure was not significant (OR = 0.71, 95% CI: 0.49-1.01, p = 0.058). Sub-category analysis revealed strongest links in makeup products (90.9% significant items; Cramér's V up to 0.191) and personal care/toiletries (62.5%; V up to 0.367), exceeding dietary habits. CONCLUSION: High maternal microplastic exposure is significantly associated with increased GDM risk in pregnant women, suggesting that microplastic exposure may represent a novel risk factor for GDM. Public health interventions should prioritize reducing dermal exposure from cosmetics and personal care products.
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Microplastic exposure in daily life and the risk of pregnancy-induced hypertension: A study on the association between environmental pollutants and maternal-fetal health outcomes
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In a study of pregnant women, those with pregnancy-induced high blood pressure had 1.46 times more microplastics in their umbilical cords than healthy pregnant women, with polyethylene and polycarbonate being especially elevated. Microplastic exposure was linked to use of plastic containers and takeout meals, and higher levels were associated with worse outcomes for newborns. While this preliminary study has limitations, it suggests that everyday microplastic exposure during pregnancy may be connected to dangerous blood pressure complications.
Clinical Significance of Exposure to Microplastics and the Risk of Diabetes Mellitus in Humans: A Systematic Review
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This review of six existing studies found a possible link between microplastic exposure (tiny plastic particles from things like bottled water and food heated in plastic containers) and worse blood sugar control or higher diabetes risk. The connection isn't proven to be a direct cause yet—more long-term research is needed—but given how much plastic pollution is increasing worldwide, it's a good reminder to limit unnecessary plastic exposure, like microwaving food in plastic or relying heavily on bottled water, especially if you're at risk for diabetes.
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