Feasibility, Safety and Acceptability of Soy-Based Diet for Pregnant Women: Preliminary Results from a Pilot Randomized Controlled Trial

Introduction: Previous evidence suggests that soy containing foods may have beneficial effects on lipid and glycemic metabolism due to their biologically active components, including soy protein and isoflavones. Pregnancy is associated with changes in glucose and lipid metabolism, partially attributable to elevated estrogen concentrations. We have previously reported a significant, inverse association between urinary excretion of isoflavones and cardiometabolic risk markers in pregnant women, using data from the National Health and Nutrition Examination Survey (NHANES). Further studies are needed to determine the cardiometabolic health effects of soy intake in pregnant women. Hypothesis: We hypothesize that consumption of soy-based whole foods is safe and acceptable for pregnant women and has beneficial cardiometabolic health effects. Methods: A pilot randomized controlled trial (RCT) was conducted in 30 pregnant women who received counseling to consume either a high-soy or low-soy foods containing diet. ...