Whitens teeth, alleviates gas & bloating, treats alcohol poisoning & helps prevent hangovers, mold cleansing, water filtration, emergency toxin removal, skin & health, digestive cleanse. Activated charcoal can be effective for reducing gas especially after eating foods such as beans that commonly create excess gas. It can also relieve an upset stomach or nausea. However, it is worth repeating that activated charcoal should not be used every day.