Saliva Collection (IMAGE) American Chemical Society Caption Saliva collected before and after tasting chocolate milk samples is analyzed for changes in proteins that may affect bitterness. Credit Cordelia Running Usage Restrictions Please credit Cordelia Running for this image. 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.