Retinol-Treated Skin (IMAGE) Michigan Medicine - University of Michigan Caption Before-and-after pictures of skin treated with retinol. Credit University of Michigan Health System Usage Restrictions The image may be used by the news media only. Contact U-M Health System for other uses. License Licensed 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.