(CNN) Whether a cup of java will leave you craving more could be chalked up to your genes. People with a newly identified genetic variant in their DNA, called PDSS2, may be inclined to drink fewer cups of coffee than others, according to a small study published in the journal Scientific Reports on Thursday. "I actually was very surprised to find a new gene for coffee consumption," said Nicola Pirastu, a chancellor's research fellow at the University of Edinburgh's Usher Institute of Population Health Sciences and Informatics, and lead author of the study. "We believe that this PDSS2 genetic variant is impacting coffee drinking through the regulation of the speed at which caffeine is metabolized," he said. "It has been observed before that higher levels of PDSS2 inhibits the expression of the genes metabolizing caffeine and thus the speed at which caffeine is degraded."A newly identified gene may be linked to fewer coffee cravingsJust under two-thirds of American adults drink at least one cup of coffee a day
A separate study, published in 2014, linked about a half-dozen other genetic variants in human _ to the volume and frequency of people's coffee-drinking behavior.