Vitamins in Tears (IMAGE) Michigan Technological University Caption The research team from Michigan Tech only needed to gather a few microliters of tears to analyze the vitamins in them. Credit Sarah Bird, Michigan Tech Usage Restrictions please credit 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.