You can use activated charcoal to remove stains from your teeth. It's believed that charcoal can remove pigments and stains from your teeth because it's highly absorbent. It's said to also get rid of bacteria and toxins in the mouth. There are toothpastes that contain activated charcoal and claim to whiten teeth.
HOW TO USE
If you’d like to try activated charcoal to whiten your teeth, you can purchase it as a powder or in capsules that you open. Mix with water to make a paste. You can also try sprinkling the charcoal onto your wet finger or toothbrush.