GLP1R and diabetes mellitus: This finding was later combined with research by Joel Habener and jointly published in JCI.11 The team of Jens Juul Holst at the University of Copenhagen in Denmark published a report in FEBS Letters, reaching the same conclusion in January 1987.23 In December 1987, Stephen Bloom’s team confirmed in a Lancet paper that GLP-1(7-36) is a human intestinal hormone that stimulates insulin production in the pancreas and lowers blood sugar.24 GLP-1, used for treating diabetes, is quickly broken down in the body, requiring high doses that can cause side effects like nausea.