There are many benefits of activated charcoal for yourself, your home, your pets, and your garden. When ingested, activated charcoal works as a detoxification agent, treating poisonings, drug overdoses, bowel diseases, heartburn, indigestion, and other unpleasant health issues. Externally, it can be used to treat insect bites, rashes, and open wounds, and is an effective eye wash and skin purifier.