Apple cider vinegar is an acidic solution by fermenting apples. The combination of acidic vinegar and fruit pectin is supposedly the reason behind this solution’s fat burning effects.
Does the apple cider diet work?
According to Katherine Zeratsky, R.D., L.D. of the Mayo Clinic, there is no evidence that taking apple cider vinegar for weight loss is effective.
The apple cider vinegar diet requires you to take 1-3 teaspoons of apple vinegar before each meal; any more than three might be too much for your stomach to handle because of the strongly acidic nature of vinegar.
Advocates of this diet claim that taking apple cider vinegar before meals or taking an apple cider vinegar supplement will help burn more fat, curb your appetite, and reduce your cravings. Unfortunately none of these claims has been proven.
And, since apple cider vinegar is acidic, consuming it frequently or in large quantities may irritate the throat. It may also interact with certain drugs, including diuretics, and increase your risk of potassium loss.
Source: Mayo Clinic