Gestational diabetes mellitus (GDM) is associated with elevated long-term cardiometabolic risk, making the postpartum period an important opportunity for preventive intervention. A systematic review and meta-analysis published in Diabetes Care evaluated whether postpartum dietary interventions improved cardiometabolic profiles in women with prior GDM.

The analysis included 19 randomized controlled trials involving women aged 18 to 45 years with previous GDM. Studies were identified through searches of six databases covering January 1980 through December 2025. Follow-up durations ranged from 12 weeks to 3 years, and evaluated outcomes included body mass index (BMI), waist circumference, weight, glucose measures, hemoglobin A1c (HbA1c), blood pressure, lipids, and inflammatory biomarkers.

Findings

• Compared with standard care, postpartum dietary interventions reduced BMI by 0.46 kg/m² and waist circumference by 1.47 cm.
• Body weight was also lower with dietary intervention compared with standard care (mean difference −0.73 kg).
• Dietary interventions improved insulin resistance as measured by HOMA-IR and reduced HbA1c levels by 0.24%.
• No significant improvements were observed for systolic or diastolic blood pressure, lipid measures, fasting glucose, 2-hour glucose, or inflammatory biomarkers.
• Study heterogeneity, variable adherence to counseling-based interventions, and comprehensive standard postpartum care were identified as potential limitations affecting observed outcomes.

The analysis demonstrated modest but statistically significant improvements in select cardiometabolic indicators following postpartum dietary interventions in women with prior GDM. These findings support the postpartum period as an important opportunity for cardiometabolic risk reduction strategies.