I find that simply diluting it with plain ol' tap water does the trick
Sorry I don't have the evidence to hand on this but.
Apple cider vinegar (ACV) contains magnesium, which increases bile acid in the gall bladder, which lowers the free cholesterols in the blood removing it as you pee it out.
During a fasting state the the bile acid is more concentrated, (I remember reading) and this is one of the reason to drink ACV in the mornings your getting the most bang for your buck.
Magnesium is an electrolytes, so I drink it with a sports water(electrolytes). I figured I am getting a double whamy this way.
My reasoning el + el = doing much more work with no added effort by me.
Seems to make sense.