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.
Oxalate-Rich Foods. Since oxalates form a large percentage of kidney stonesâ compositional value, consuming oxalate-rich foods is likely to trigger stone formation in vulnerable individuals. Thus, preparations containing high quantities of rhubarb, spinach, sweet potatoes, caffeine, chocolate, Swiss chard and soy should be avoided.