Preeclampsia carries implications in adult life, with offspring of affected preterm pregnancies demonstrating poor growth in childhood and an increased risk of hypertension, heart disease, and diabetes. This chapter discusses the role of maternal nutrition in the prevention and development of preeclampsia. Restriction of activity and prolonged resting has traditionally been advocated for the prevention and treatment of many of the ailments of pregnancy, including the prevention and treatment of hypertension. The evidence linking the promotion of regular exercise and a reduction in the risk of hypertension in the nonpregnant person is well established. Achieving an ideal body mass index (BMI) relationship between a person's height and weight by weight loss before conception may be the most prudent advice in many patients. The chapter highlights the significant lack of quality studies from which to draw conclusions regarding the role of nutrition in the prevention or treatment of preeclampsia.