Ag/TA coating (IMAGE) University of Tokyo Caption Despite their ability to neutralize pathogens, polyphenols and silver are considered to be extremely safe. Polyphenols are in many kinds of foods consumed daily, and silver does not interact with the human body. So Ag/TA coating could be done by anyone, not just in tightly controlled industrial settings. Credit © 2022 Ejima et al. Usage Restrictions Credit © 2022 Ejima et al. 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.