The typical use for this product is to help trap poisoning or gas. I have used it in the past for these purposes and found that it works, but most recently I used it to brush with to whiten my teeth. Every other day for two weeks I would break open a capsule onto a spare toothbrush with just a speck of toothpaste and brush for two minutes. I noticed at least two shades whiter after the two week timeframe and was very pleased with the progress. I also noticed that my breath maintained a wonderful degree of freshness for longer after I started brushing with the activated charcoal. I would recommend this product to anyone looking to whiten their teeth naturally and cost efficiently while avoiding harsh chemicals.