What is a two day diet? I have never heard of it before. I mean, what can you possibly achieve in two days? Two days is too short a time span for anyone to be able to lose any significant amount of weight and you should not get your hopes up high. Unless you are planning to go in for liposuction, there is no way that you are going to lose weight in two days. I would also urge you to reconsider if anyone ever tells you that a two day diet will work. It takes months of hard work and discipline to even lose a few kilos.