I assume you are referring to Andy Cutler protocol chelation.
I used ACC successfully for my former lead toxicity problem. I can't say enough about the positive effects I've experienced.
Of course most people don't have heavy metals as their primary medical problem, however, after a decade in the detox support groups I'm convinced that many people have HMs as a contributing factor.
In addition to this group there is a large Cutler support group at FB and Andy-Cutler-Chelation.com
Don't forget Cutler's strong warning about getting generous amounts of antioxidants--vitamin C, E--to protect you from mobilized HMs.
Some of us like to take some of the antioxidant selenium at the end of each round to help with mop up of mobilized HMs.
Zinc and magnesium round out Cutler's "core 4" supplements; however, many other supplements can be helpful for the many symptoms HM toxic folks tend to have.
Some of us will also benefit from some medication for one or another issue. However unlike the Pharma salesmen Cutler recommended medications while the person is working to address underlying causes for health struggles.