Not that I have ever heard,altho there is a rumor that some celebrities use it,or odd mixtures of lemon juice or pancake syrup.But I think those rumors are just to cover up their plastic surgery remedies.Cider vinegar is an acid.The only acid I have ever heard is a weight loss aid that is truly a weight loss aid and is safe is yellow grapefruit juice.One eight ounce glass a day can really speed up the metabolism,without harming the user,providing they are not allergic to it.
According to most reviews, apple cider vinegar is a good product for weight lose. Research studied by various research fields stated that with the right dosage and a precise follow up on the dosage, apple cider vinegar would give very satisfactory results. One has to carefully choose the right diet to go with the supplements. Check out http://www.ehow.com/how_4436090_lose-weight-apple-cider-vinegar.html for more details.