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.
Because the most common kidney stone type is composed of calcium oxalate, this would seem to suggest that restricting calcium (in dairy products and supplements) and oxalate (in green leafy vegetables, tea, and chocolate, among other items) is the key to preventing stones.