Reptilian drug may help treat diabetes

The synthetic version of a compound in lizard venom seems to complement insulin and help people with diabetes steady their sugar metabolism, a new study finds. The drug, called exendin-4, is a protein fragment that researchers originally isolated from Gila monster venom. Exendin-4 functions like a substance called glucagon-like protein-1, or GLP-1, which people secrete in their intestines.