-Activated Charcoal: Activated charcoal has a long history as a substance used to treat poisoning, with the first patient being treated nearly two centuries ago. That’s because the charcoal adsorbs—or binds with—much of what it touches.
Even though there are now other, more preferred methods for treating poisonings, the binding capabilities of activated charcoal have made it a popular addition in a number of beauty products, including toothpastes and teeth whiteners.
Unlike whitening kits you might find in a store, which use hydrogen peroxide to whiten the dentin beneath the tooth’s enamel, activated charcoal removes surface stains only. This makes it a good option for naturally reversing stains caused by foods, beverages, or tobacco.To give this product a try, I recommend smearing an activated charcoal paste onto the teeth and letting it sit for 5-10 minutes before rinsing and gently brushing away any excess.
-Whitening toothpaste: You’ve likely seen toothpastes claiming their whitening powers, from major brands to natural options at your local health food store. But there’s something important to note here: Whether it’s a natural or conventional toothpaste, there’s really no such thing as a whitening toothpaste.
Toothpastes can’t whiten your teeth—they can only help to clean them.I recommend making your own toothpaste, since traditional toothpastes include all kinds of questionable ingredients like triclosan, sulfates, and artificial colorings.
-Brushing with baking soda: Baking soda can gently polish away stains on the surface of the teeth. Some people worry that baking soda is too harsh and may grind away enamel, but research from 2017 found it to be a safe way to remove stains.Baking soda may also help to fight bacteria, which suggests that it may be able to reduce plaque and prevent tooth decay.
-Whitening with fruit: Papain and bromelain, which are enzymes that occur in papayas and pineapples respectively, may both help to whiten teeth.
A 2012 study found preliminary evidence that solutions containing these ingredients could offer modest whitening effects. However, the authors of the study caution that more research is necessary to determine whether or not these enzymes are effective.