Hi, welcome to 3FC
By CSD, do you mean the cabbage soup diet? I would recommend you avoid it and try something more balanced. The cabbage soup diet is good for dropping a few quick pounds of water, but it's not a good choice for losing fat.
The premise of the cabbage soup diet is that your body burns more calories digesting this soup than it contains. This is a myth. You will probably lose weight with this diet, because it is extremely low in calories. However, most of weight loss will be water or lean mass, and you will regain it quickly. The diet is not nutritionally sound and many people become ill when following it. Some copies of this diet claim that it is given to patients that need to lose weight before surgery, but this is completely false.
If you have the time, please browse around our forums and read about some of the other diets that have worked for members long term.
Good luck!