August 7/Chicago/Loyola University -- A urologist at Loyola University Medical Center in Chicago warns consumers that iced tea contains high concentrations of oxalate, one of the key chemicals that can lead to kidney stones.
Though in healthy bodies kidney stones -- small crystals made up of minerals and salts found in the urine of kidneys or ureters -- are expelled naturally from the body, stones can grow large enough to become lodged in the small tubes that drain urine from the kidney to the bladder.