John Courteney-Smith, the Reptile Products Manager at Arcadia Reptile joins us to talk about Metabolic Bone Disease and UVB. John has a mission to eradicate this affliction and spends a great deal of time educating the community on UVB and Vitamin D3. He has written The Arcadia Guide to MBD and its Elimination in Captivity. This podcast episode is an introduction to that book.