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.
Foods that are highest in oxalate include fruits, vegetables, nuts, seeds, legumes, and grains. High-oxalate fruits include berries, kiwis, figs, and purple grapes. Vegetables that contain high levels of oxalate include rhubarb, okra, leeks, spinach, beets, and Swiss chard.alcium is also helpful. Getting too little calcium can increase the amount of oxalate that gets to the kidneys, which will then increase the risk of kidney stones. Lowering your salt intake can also lower your risk of kidney stones, since high-salt diets tend to cause more calcium to be lost in the urine.