Streptozotocin (Streptozocin, STZ, Zanosar) is a naturally occurring chemical that's particularly toxic to the insulin-producing beta cells of the pancreas in mammals. It is used in medicine for treating certain cancers of the Islets of Langerhans and used in medical research to produce an animal model for Type 1 diabetes. Usage Streptozotocin is approved by the U.S. Food and Drug Administration (FDA) for treating metastatic cancer of the pancreatic islet cells. Since it caries a substantial ris… (More on Streptozotocin)