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.
In addition to spinach, grits, liver, nuts, wheat bran and rhubarb, several other foods raise levels of oxalate in the blood, including beets, Swiss chard, okra, sweet potatoes, beans, black tea and chocolate. If you frequently develop kidney stones or gout, limit your consumption of these foods.