Analysis of commercial kidney stone probiotic supplements.

Objective: To examine the levels of Oxalobacter formigenes in probiotic supplements marketed by PRO-LAB, Ltd, Toronto, Canada, and capsules of Oxalo purchased from Sanzyme Ltd, Hyderabad, India, and to measure the ability of these preparations to degrade oxalate in vitro.

Methods: Probiotic supplements and pure cultures of O. formigenes were cultured in a number of media containing oxalate.