It always drives out some stagnant bile for me, perhaps you should dilute it? I always only have 1/4th cup of non concentrate AJ with 1tbsp of ACV and water on the day of the flush, Malic acid is good too.
Make sure you do some form of Bowel Cleanse if you use Malic Acid (or Apple juice, ACV) on a fast day, because you might get a headache (not from the sugar)