Maternal nutritional risk factors for pre-eclampsia incidence: findings from a narrative scoping review.

Pre-eclampsia is a condition of high blood pressure during the second half of pregnancy with signs of damage to another organ system, often the liver and kidneys. It is a serious and potentially deadly disease and is the second top cause of deaths related to pregnancy and childbirth globally. Though the exact cause of pre-eclampsia is unclear, researchers have discovered that pre-eclampsia develops through abnormal development of the placenta, which is the interface between the growing baby and the mother in the womb. The placenta helps to transfer nutrients, oxygen and waste between the mother and fetus. Nutrition has important roles to play in the development of the placenta and certain vitamins and minerals have clinical properties that may help prevent pre-eclampsia. We conducted a review to summarize observational studies on maternal nutritional risk factors associated with the development of pre-eclampsia. Promising maternal dietary factors that fit with current understandings of how pre-eclampsia develops include vitamin C and its potential relationship with iron, calcium and vitamin D. Healthy dietary patterns with high consumption of fruits, vegetables, whole grains, fish and seafood and monounsaturated vegetable oils are likely beneficial. Foods high in added sugar, such as sugary drinks, may be linked to higher rates of developing pre-eclampsia. Instead of focusing on single nutrient deficiencies, our findings support a broader approach to explore interrelationships between dietary factors and balanced healthy dietary intake for the prevention of pre-eclampsia.