A bile acid naturally present in the body (ursodeoxycholic acid) may contribute to the growth, spread, and metastasis of ovarian tumors, according to a study by researchers at the University of Debrecen. This finding is significant because previous studies on this substance had only demonstrated anticancer effects. The research highlights that substances produced by gut bacteria can affect different types of tumors in varying ways. The researchers have received the Publication Award from the University of Debrecen and the Count István Tisza Foundation for the University of Debrecen for their paper presenting these findings.