Vitamin D has been a controversial topic in recent times with the debate continuing over appropriate testing, adequate levels, and the evidence for treatment. We discussed the appropriateness of testing and chemical pathology component with Professor Ken Sikaris (Episode 25), but what does the research tell us about diseases associated with Vitamin D and the utility of replacement? We discuss this with Professor Scott Byrne from The University of Sydney. Our special guest is Professor Scott Byrne from the Westmead Institute for Medical Research. Professor Byrne is also Co-director of the Centre for Immunology and Allergy Research and Head of the Cellular Photo-immunology Group in the School of Medical Sciences at Sydney University. This is the second chapter in the story of Vitamin D. See omnystudio.com/listener for privacy information.