Ive heard commercials for weight loss too. I haven't tried it, sounds really interesting.. but all those exfoliators are acidic, and so is vitamin C, and skin is naturally acidic. Alkalinity, I would think, would hurt skin a lot more. Something super acidic would hurt it, but vinegar wouldn't be that super strong. I do wonder about your teeth and drinking it though.. I know acids are bad for enamel..