About UNHCR. The Office of the United Nations High Commissioner for Refugees was established on December 14, 1950 by the United Nations General Assembly. The agency is mandated to lead and co-ordinate international action to protect refugees and resolve refugee problems worldwide.
2. If kidney stones are hereditary, you should steer clear of foods that contain oxalates (the material that makes up the actual stones). Rhubarb is one food thatâs particularly high in oxalates.
1 Calcium stones. 2  Most kidney stones are calcium stones, usually in the form of calcium oxalate. 3  Oxalate is a naturally occurring substance found in food. 4  Some fruits and vegetables, as well as nuts and chocolate, have high oxalate levels.