Red blood cell (RBC) transfusions save countless lives each year, but the molecular effectiveness of such treatments, especially in trauma patients, isn’t well-studied. A groundbreaking study using plasma metabolomic and proteomic measurements from trauma patients provides a first-of-its-kind molecular-level evaluation of RBC transfusion efficiency. The complete manuscript by Ian S. LaCroix, Mitchell Cohen, and Monika Dzieciatkowska is…