If you want lose the weight properly (the fat) it will not happen fast, the maximum amount of weight you should lose is 1-2lbs per week.
I am assumming that you're looking for a magical weight loss supplement since you posted this in the supplement forum, bad idea. If you're looking for permanent weight loss you need to work on your diet.
I suggest you read thru some of the articles here: http://www.ironmagazine.com/allarticles.html
specifically the diet and nutrition section.