Before chelation I recommend you bowel cleanse, liver and kidney cleanse. Juice fast with lots of raw organic vegetables and fruits also wheat grass juice for one week minimum. Then chelate on Cutler's protocol with companion nutrients - magnesium,selenium, zinc, C, B, milk thistle...
There lot's of things to do before chelation - improve diet, cleanses. You have to eliminate the bad habits. I recommend you to start with that and read the info in curezone. The search engine is always available and necessary.