Clinical Director of Endocrinology at CHOP, Andrew Calabria, MD, talks about forms and sources of vitamin D, the role it plays, targets for vitamin D intake for infants and children, when vitamin D supplements are called for, preventing vitamin D deficiency and rickets, and more. Published July 2019. This podcast is for general informational and educational purposes only and is not to be considered as medical advice for any particular patient. Clinicians must rely on their own informed clinical judgment in making recommendations to their patients. ©2019 by Children's Hospital of Philadelphia, all rights reserved.