Adults ages 18-89 with history of kidney stones needed for a study Individuals ages 18-89 years with a history of Calcium Oxalate kidney stones, are needed for a study exploring factors that impacting oxalate metabolism in kidney stone formers. The study involves consuming prepared meals over 4 days and collecting urine and blood. Compensation up to $140. For more information, call 205-934-5712 or email kidneystone@uabmc.edu or kidneystoneresearch@uabmc.edu.