There's no 100% proof that says or can tell whether the Apple Cider Vinegar helps someone to lose weight but people who've taken apple cider vinegar to lose weight have reported that they've lost weight while taking apple cider vinegar daily.
The way Apple Cider Vinegar is supposed to help you lose weight is it helps to turn your fats metabolism on which is supposed to help your body use your fat as energy instead of storing your fat in your body.
To use Apple Cider Vinegar to lose weight add 2 teaspoons of apple cider vinegar to an 8 ounce glass of water and drink it 3 times per day after every meal.