Kvas of chelidonius is using,like additional cure in tumors as in malignant.

As method for cooking is same,as in three l. of water adding one glass of sugar, half of glass chelidonius,wrapped in gauze bag with stone, as for a filling a jar hole, one tea.sp. of fromage, or whey, mixing an all in three l. of jar, infuse at room for three weeks, covering top with gauze, use one tbl.sp. till glass for three times/day before meal.

As whey is must to be got of filtered sour milk, as in milk curding in warming as benefit bacterias  are removing, such whey in bacterias are alive, use kvas one tbl.sp. till glass between meal time.