Dr. Yanhong Liu is a postdoctoral research fellow in the Stein Monogastric Nutrition Lab. In this podcast, she reports on research to determine the digestibility and retention of micro minerals in pigs fed either inorganic or organic sources of zinc, copper, manganese, and iron. Adapted from a presentation at the 2013 ASDA-ASAS Joint Annual Meeting, Indianapolis, IN, July 8-12.