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.
Here are five foods that can cause kidney stones because of a high oxalate content. 1  Sweet potatoes, baked or cannedâThese vegetables which are often advised as being better for you then regular white potatoes which are very high in oxates.  Kiwi fruitâThis is one of of the fruits highest in oxalates.