illustration (IMAGE) UT Southwestern Medical Center Caption Dietary vitamin A becomes retinol, which is internalized into cells by LRP1 and promotes adaptive immunity in the intestine. Credit: Courtesy of the Hooper Lab using BioRender.com Credit UT Southwestern Medical Center Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.