Not as a 'diet' on it's own, but along with whatever program or lifestyle you have adapted to lose/maintain weight.
I have not tried it yet, but my mom drinks it because she says it gets rid of her migranes and it breaks up the bland taste of plain water once and a while.
It is available at health/whole foods stores and the kind I purchased is called "Vita Coco" and has 60 cal per 250ml and is full of vitamin C, magnesium and potassium. It is always sold out but I was finally about to purchas some.
Does anyone drink coconut water and find that it affects their weight as opposed to regular water (on occasion) or find it to have any other health benefits? What do you think about the taste?