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.
Kidney stones form from these minerals: Calcium stones are the most common and are usually made of calcium oxalate. Oxalate is a substance in food, including some fruits, vegetables, nuts and chocolate. Calcium or oxalate may be increased in the urine because of.