In this conversation, Douglas Lucas interviews Lily Nichols, a registered dietitian specializing in nutrition for women during the perinatal years. They discuss the critical role of nutrition in bone health, particularly for young women and athletes. The conversation covers the importance of protein, vitamins D and K2, the implications of plant-based diets, and the necessity of proper supplementation. Lily emphasizes the need for adequate nutrition to support both maternal and fetal bone health, and the potential consequences of undernourishment during pregnancy and beyond.