Does charcoal teeth whitening work? Is activated charcoal safe for your dentition?

Jack Lawrence

Written by Jack Lawrence DMD, Nichole McKenna DDS

Activated charcoal has gained popularity recently due to its acclaimed use in medicine. Many users report that it was effective in whitening their teeth. The method is still controversial, nonetheless. There isn’t much research to confirm the safety or value.

We can be sure of certain properties, but whether they are effective and appropriate in teeth whitening is still not known. Professionals have different opinions on proper use and recommended frequency. We have broken it all down below for you, so you can make an informed decision.

What is activated charcoal?

Does activated charcoal really whiten teeth?

Activated charcoal teeth whitening dangers

Is activated charcoal safe for teeth? There is no unanimous or unequivocal answer.

American Dental Association’s Seal of Acceptance likewise does not stand for activated charcoal’s safety or effectiveness in whitening teeth. This is mostly due to the fact that this method has not been widely studied. Most assertions put forward by manufacturers are simply unsubstantiated claims.

JADA specialists also highlight that a third of charcoal products contain bentonite clay. Research shows this ingredient may include lead. Even in small doses, this substance is toxic and shouldn’t be used in or on the body.

What’s more, the technique of activated charcoal teeth whitening may bring unwanted side effects.

Damaging the outer surface of your teeth can lead to staining, which is counterintuitive as charcoal is supposed to make your teeth brighter. When used too intensively, the dentin beneath the enamel can start poking through. The smile then begins to look yellow.

Your sink and countertops may also become stained, so handle the product with care.

If any of these complications start becoming apparent, stop using charcoal and contact a specialist.

How to use activated charcoal to whiten teeth?

Due to the above-mentioned dangers, you should pay particular attention to how your mouth reacts while you are using activated charcoal.

Whitening instructions depend on what type of product you use. There are still a few general rules you should follow to minimize the chance of side effects.

Consult with your dentist

Undertaking any dental treatment without a dentist assessment may be dangerous to your oral and general health. You can ask your specialist about charcoal teeth whitening during a routine exam. He or she will let you know whether you are a good candidate.

Prepare your mouth for whitening

Choose the right product

Activated charcoal may come in the form of toothpaste, powder, or tablets.

Before purchasing your whitening product, check the relative dentin abrasivity (RDA). The FDA does not recommend using anything with an RDA of over 200, while dentists may be even more restrictive. It could quickly wear down your enamel and lead to damage.

Make sure to also look into whether you are allergic to sorbitol. Many activated charcoal products contain this ingredient.

Use activated charcoal with caution

If the product goes on your toothbrush, use gentle, circular motions to clean your dentition. In order to make it even safer, you can use your fingers instead of a brush. Simply leaving it on, though, will not give you any effects, as charcoal only whitens thanks to its abrasivity.

Do not reach for the product for long periods of time. Some may state they are safe to use everyday, but there is no evidence to back this up. Instructions on the packaging are vital, but you have to first and foremost adhere to recommendations by your dentist.

A specialist is always more informed on the situation in your mouth than a manufacturer who writes generalized guidelines. Prolonged exposure to activated charcoal may even lead to an overdose.

Matthew Stewart

Matthew Stewart, DDS

Initially, activated charcoal will whiten the teeth by removing the surface stains, but is also removing enamel. It is much safer to use traditional teeth bleaching products.

And lastly, do not swallow the charcoal. It is a laxative.

Remember, activated charcoal whitening is not an alternative to dental hygiene. Make sure to brush and floss your teeth as you normally would afterwards.


Until a legitimate study confirms it is not harmful, pregnant women and children should avoid activated charcoal whitening products. Those groups are particularly vulnerable to para-medical techniques that haven’t been thoroughly tested.

Most products have a price tag of around $25-$50.

The widest selection is available online. Many products are also starting to appear in drugstores.

Dentists generally don’t recommend charcoal at all. If you decide to go for it anyway, the rule of thumb is to use it no more than 2-3 times per week.

How quick results appear is dependent on multiple factors. Typically, though, charcoal teeth whitening reviews state visibly brighter teeth after about 3 weeks. Remember to take breaks to give your dentition time to recover between treatments.

Other alternative and DIY remedies for bleaching teeth include using baking soda or hydrogen peroxide. If you want professional-grade results, you may want to invest in an LED teeth whitening kit.

In-office results are usually faster and less risky. Your dentist can apply more concentrated products to whiten your teeth in as little as one appointment. You may also receive custom trays to use at home.