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.
Too much vitamin D and/or calcium can lead to kidney stones. No more than 4,000 IU of vitamin D should be consumed daily and no more than 2,000 mg of calcium. Magnesium is found in nuts, beans, whole grains and green leafy vegetables magnesium levels are generally good in people who have a balanced diet.