It's activated charcoal for binding to the toxins and helping the body to remove them. But, when binders are used, we have to keep anything that we want the body to absorb 2 hours away (before and after) taking it, or it will bind to the charcoal and just be removed. Things like food, supplements, treatment abx, any hormones or even pain killers.
The other thing that we have to watch out for is constipation, because if that develops, it only leads to toxins being reabsorbed.
You can find this and other good detoxing suggestions here:
www.tiredoflyme.com/detox-methods.html and we have some good suggestions in the "New to Lyme?" thread as well.