More on Activated Charcoal:
Processing charcoal at very high temperatures activates its internal structure. Because this process reduces the size of its pores, it increases its surface area.
At this point charcoal has a negative electrical charge, and negative charge makes it attract positively charged molecules, such as toxins and gases in the gut. Because our digestive system doesn’t absorb charcoal, it can eliminate toxins bound to it from the body with our feces.