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.
Diet + Water. You should avoid or lower the consumption of foods rich in oxalate such as: chocolate, tea, caffeine, salt, nuts, beets, rhubarb, spinach, wheat bran and phosphate based soft drinks. According to a research also grapefruit juice increases the risk of kidney stones.