Smart Insulin Patch (2 of 2) (IMAGE) University of North Carolina Health Care Caption This is an up-close fluorescent image of the microneedle patch with insulin tagged in green. Credit Zhen Gu, Ph.D. Usage Restrictions credit properly 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.