Fruits and Vegs - Duke 2 (IMAGE) Duke University Caption DNA Barcoding can now be used to identify what plants a person has eaten, and in what relative amounts. The technique should improve clinical trials and nutrition studies. (Image, Lawrence A. David) Credit Lawrence A. David, Duke University Usage Restrictions none 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.