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.
1 If you tend to form calcium oxalate stones, your doctor may recommend restricting foods rich in oxalates. 2  These include rhubarb, beets, okra, spinach, Swiss chard, sweet potatoes, nuts, tea, chocolate and soy products.
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.