In this episode, The Curious Clinicians examine why upper gastrointestinal bleeding raises BUN. The answer involves experiments where participants were asked to drink blood (!) and the 700 sextillion (7 x 1023) amino acids that comprise the hemoglobin content in a liter of blood.  Read the show notes here. Click here to obtain AMA PRA Category 1 Credits™ (0.5 hours), Non-Physician Attendance (0.5 hours), or ABIM MOC Part 2 (0.5 hours). Audio edited by Clair Morgan of Nodderly.com. This episode was sponsored by Green Chef!