Turning White Fat Brown (IMAGE) University of Pennsylvania School of Medicine Caption This image shows adipose tissue, with fat droplets in green and blood vessels in red. Credit The laboratory of Zoltan Arany, MD, PhD, Perelman School of Medicine, University of Pennsylvania Usage Restrictions None 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.