Metalheart
I have the same "problem" with weight gain. I used to eat large pizzas and sides of cows at dinner and still never gained anything. Basically I gave up trying. I have since detoxed and enjoy the balance a natural lifestyle offers.
My wife and I have done the Colonix program twice. I thought it worked well. However, the first time in 2005(?) it seemed more effective. The Kleri tea was more enjoyable as well. Nevertheless Colonix (both times) worked for us.
Warning: make sure you drink your 6-8 waters per day!! :)