Barton suggests drinking 2 liters of coke (the soda pop) over two hours on an empty stomach. Then followed immediately with 8 ounces of cooked then pureed asparagus. This is then followed by two hours of drinking water.
Theory: The phosphoric acid in coke dissolves the stones (calcium types only)and the asparagus acts as a diuretic to help clear the stone(s). The followup water helps push the stones down the tract and rehydrates you (the coke is dehydrating).