I talk with doctor and whistleblower Richard Semelka about his work to uncover the damage done by gadolinium, a heavy metal often added to a patient's bloodstream to make MRI's easier to read. In some patients this leads to Gadolinium Deposition Disease (GDD). We talk more broadly about the ways in which modern medicine is failing, and Semelka's legal battles after calling out another doctor for operating while drunk. Related links: • Richard Semelka homepage • Docpanel radiologist profile • GADTTRAC nonprofit