Activated charcoal seems to be the new trend in whitening teeth recently. Some stores are having a difficult time keeping the product stocked on shelves.
Activated charcoal toothpaste is said to bind to everything in its path, stains, tartar, bacteria and viruses. It may leave you with a whiter smile, but is said to remove all nutrients and good bacteria needed for your tooth structure. It may also bind to medications that the body needs to absorb and even bacteria that you need for digestion.
A big risk is that non-activated charcoal is extremely dangerous and there isn't proof that some manufacturers are using the correct type of charcoal. The tooth whitening market is a billion dollar industry, so if it was fully safe and effective, the big brands would be using it. If you do decide to use activated charcoal toothpaste, dentists agree that you should do so cautiously and sparingly. If you want whiter teeth, your best bet is to book an appointment with your dentist (and start brushing after each cup of coffee or glass of red wine). The safest way to whiten your teeth is by using a well-tested product coordinated by a dentist.