Hmm... I'm not really sure about losing fat so quickly. In almost every aspect, acquiring something too fast may cause side-effect. Take most Western medicine for example (note: I don't mean to judge anything, this is just my opinion), most medicine has some sort of chemical substance in it and using too much or in wrong way can cause serious health problem, for example like the antibiotic.
And so if I may I would suggest reducing fat in slow, but healthier method: combining exercises and diet. Going for body building can also be nice way for it.