Maternal Protein Sources and Risk of Hypertension Within 10 Years Post-Pregnancy

Overview

In a large Norwegian cohort, intake of protein from dairy products, especially milk and yoghurt, was associated with a reduced risk of pharmacologically treated hypertension within 10 years after pregnancy. Conversely, higher consumption of red meat protein was linked to an increased risk, while plant-based protein showed no significant association.

Background

Hypertension is a leading risk factor for cardiovascular disease and premature death in women, with risk influenced by factors including pregnancy-related complications. Dietary protein sources may differentially affect blood pressure regulation, but evidence remains inconsistent, particularly in young women. This study examined the associations between maternal intake of various protein sources during pregnancy and subsequent development of hypertension requiring medication.

Data Highlights

Key Findings

• Among 59,967 Norwegian mothers without pre-pregnancy hypertension, 2.5% developed pharmacologically treated hypertension within 10 years postpartum.
• Higher intake of dairy protein, particularly from milk and yoghurt, was inversely associated with hypertension risk (HR 0.76 for highest vs. lowest quintile).
• Increased consumption of red meat protein was positively associated with hypertension development (HR 1.27 comparing fourth to first quintile).
• No significant associations were observed between plant-based protein intake and hypertension risk.
• The study controlled for multiple confounders using Cox proportional hazards models in a large prospective cohort.

Clinical Implications

These findings suggest that encouraging consumption of dairy protein sources such as milk and yoghurt during pregnancy may contribute to lower long-term hypertension risk in women. Conversely, limiting red meat protein intake could be beneficial for hypertension prevention postpartum. Plant-based protein intake did not show a significant impact, highlighting the importance of differentiating protein sources in dietary counseling.

Conclusion

In this large prospective study, maternal intake of dairy protein was associated with reduced risk, while red meat protein was linked to increased risk of pharmacologically treated hypertension within a decade after pregnancy. These results underscore the relevance of protein source selection in dietary strategies to mitigate hypertension risk in women.

References

1. Norwegian Mother, Father and Child Cohort Study (MoBa) -- Association of Maternal Dietary Protein Sources and Hypertension Risk