Important facts are: your age, weight and BMI.( this will tell you what is a healthy weight for you)
Replacing the bad fat with healthy fats.
Green Tea beverage.
Fruits like Papaya, Pineapple will also help not only cleanse your colon
but boost your metabolism
. (Don't forget that other fruits are beneficial as well)
Exercise is a very important key *Aerobics*
I hope this helps :-)