Typically, you should take somewhere between 15-30ml or two tablespoons of apple cider vinegar a day mixed in with water.
However, if you’re taking apple cider vinegar with mother in pill form, then depending on the concentration, you should be able to take as few as one per day.
It all depends on how you’re taking the apple cider vinegar with 'the mother' as well as the dosage indicated on the supplement label.