Motivate me?

So I have always been big, and for some reason I really want to lose weight so I am doing this 21 day no food challenge and I hope I could do it, I want to lose at least 50 pounds but it is also a cleanse so after I want to try maybe weight loss pills and apple cider vinegar, I do also have insanity so I will be doing that during my 21 days, wish me luck and I will post pictures after the days are up.