Recent research involving two Irish cohorts reports that pregnant women who more closely follow the Planetary Health Diet have higher intakes of several key pregnancy-related nutrients, including folate, calcium, iron, and fiber.

Published in the American Journal of Clinical Nutrition, this study is among the first to investigate the Planetary Health Diet during pregnancy. It offers insights for healthcare providers and expectant mothers on aligning diet with health and sustainability, while clarifying that the diet alone does not meet all prenatal nutritional requirements.

What We Know So Far

  • A study of 678 pregnant women found greater adherence to the predominantly plant-based Planetary Health Diet, which aims to optimize human health and minimize environmental impact, was associated with higher intakes of folate, iron, calcium, magnesium, and dietary fiber, as reported by Medical Xpress.
  • Despite these benefits, the diet did not improve intakes of vitamin D, vitamin B3, and iodine; women following it were less likely to reach high levels of these, according to Nutrition Insight.
  • Researchers concluded that while the Planetary Health Diet can meet most nutrient requirements in pregnancy, it does not meet all, and supplementation is still advised.

What are the Planetary Health Diet benefits for pregnancy?

Analyzing data from 678 pregnant women in Ireland, the study found that greater adherence to the Planetary Health Diet significantly improved intake of folate, iron, calcium, magnesium, and fiber—nutrients critical for maternal health and fetal development. Each plays a fundamental role during gestation.

Folate, a B vitamin, is essential for preventing neural tube defects in the developing fetus, such as spina bifida. Iron is vital for the production of hemoglobin, the protein in red blood cells that carries oxygen, and its demand increases dramatically during pregnancy to support the expanded maternal blood volume and the growing baby. Calcium is the primary building block for the fetal skeleton, and insufficient intake can lead to the mother's own bone density being compromised. Finally, dietary fiber helps manage common pregnancy-related digestive issues like constipation and can contribute to better blood sugar control.