Dr. Su A Lee, a Postdoctoral Research Associate from the Stein Monogastric Nutrition Lab, explain effects of addition of Hydrochloric acid to collection bags or containers did not change basal endogenous losses or digestibility of amino acid in corn, soybean meal, or wheat middlings fed to growing pigs. Adapted from a poster at the 2021 ASAS Midwestern Section meeting, March 8-10.