Gas reduction: Some studies report that activated charcoal may help reduce gas production following a gas-producing meal. It may also help improve the odor of gas.

Water filtration: Activated charcoal is a popular way to reduce heavy metal and fluoride content in water. 

Tooth whitening: Using activated charcoal to brush your teeth is anecdotally said to whiten them. It’s said to do so by absorbing plaque and other teeth-staining compounds. 

Hangover prevention: Activated charcoal is sometimes used as a hangover cure. While consuming it with alcohol may reduce blood alcohol levels, its effects on hangovers haven’t been studied

Skin treatment: Activated charcoal uses extend beyond internal applications. For external treatments, it’s effective at treating body odor and acne and relieving discomfort from insect bites, rashes from poison ivy or poison oak, and snake bites.