Is charcoal toothpaste safe?

Quick answer

Charcoal toothpaste is marketed for whitening, detox, and antibacterial effects. A 2017 review in the Journal of the American Dental Association found insufficient clinical and laboratory evidence to substantiate those safety and efficacy claims.

Klyyr One+ does not contain charcoal. Its disclosed abrasivity is RDA 62. That number describes One+. It is not a measurement of charcoal pastes as a group.

01
A pigment, not a bleach
Activated charcoal is a black powder. Putting it in toothpaste does not make it a whitening drug.
02
The 2017 review was blunt
Brooks and colleagues searched the clinical literature and the ads. They found insufficient data to support the safety and efficacy claims, and told clinicians to be cautious.
03
One+ is a different formula
Charcoal is not among the 16 ingredients. RDA 62 is the abrasivity number printed for this paste.

Charcoal toothpaste claims and the One+ label
Topic	Charcoal pastes The record	Klyyr One+ The label
Whitening claim	Often unsubstantiated in the 2017 review	One+ makes no whitening claim
Detox or antibacterial	Not established for these pastes	Not a One+ claim
Abrasion	A concern for some charcoal products. Not every product has a published RDA	RDA 62, disclosed
ADA abrasivity ceiling	RDA 250 for Seal-accepted pastes	62 is under that ceiling
Staining risk	Black powder can be messy on the tongue and on some restorations	No charcoal pigment
Fluoride	Many charcoal pastes are fluoride-free, which the review flagged as a separate cavity question	0 ppm fluoride, with hydroxyapatite listed
What to compare	Full ingredient list and a real RDA	Both are published for One+

The evidence statement is from Brooks, Bashirelahi, and Reynolds, Journal of the American Dental Association, 2017. RDA 250 is the ADA Seal ceiling for dentin abrasivity, not a charcoal score. One+ RDA 62 and the ingredient list are label facts.

Sources behind this answer

The review looked at charcoal and charcoal-based dentifrices. It did not test One+.

Journal of the American Dental Association · 2017
Charcoal and charcoal-based dentifrices
Brooks, Bashirelahi, and Reynolds reviewed the literature and the advertising. They found insufficient clinical and laboratory data to substantiate safety and efficacy claims of charcoal and charcoal-based dentifrices.
Read the JADA review
American Dental Association
Toothpaste overview
The ADA sets an RDA limit of 250 for Seal-accepted toothpaste. A lower RDA means less dentin wear in that lab test. It is not a whitening score.
Read the ADA toothpaste overview
Current Klyyr label
One+ formula facts
One+ lists no charcoal. It publishes RDA 62, 0 ppm fluoride, and a combined 10% nano + micro hydroxyapatite blend.
Read the One+ product page

How to choose

If you want stains lifted

Surface stain and a bleach are different jobs. Charcoal is neither a proven bleach nor a reason to skip the rest of the label. See does hydroxyapatite toothpaste whiten teeth.

If abrasion worries you

Ask for an RDA. One+ prints 62. A charcoal brand that does not print a number has not answered the question.

If the word detox sold you

Toothpaste does not detox the body. The 2017 review did not find evidence for that kind of claim.

The Klyyr One+ formula

One+ is fluoride-free toothpaste with a clearly disclosed 10% nano + micro hydroxyapatite blend, 16 listed ingredients, peppermint + spearmint, no SLS, and no artificial dyes.

01
10% hydroxyapatite
Combined nano + micro hydroxyapatite, disclosed on the label. Ten percent is not a universal efficacy threshold.
02
16 listed ingredients
Water, Sorbitol, Glycerin, Potassium Sorbate, Hydroxyapatite (nano & micro), Xylitol, Sodium Cocoyl Glutamate, Cellulose Gum, Xanthan Gum, Zinc Citrate, Aloe Vera, Mentha Piperita (Peppermint) Oil, Mentha Viridis (Spearmint) Leaf Oil, Menthol, Sodium Benzoate, Stevia Rebaudiana Leaf/Stem Extract.
03
What is not in it
0 ppm fluoride. No SLS. No artificial dyes. Sodium cocoyl glutamate is the surfactant.
04
120 g aluminum tube
4.23 oz, approximately 90 brushings. Aluminum tube, HDPE cap. Recycle where accepted locally.

In short

Charcoal whitening claims ran ahead of the evidence. One+ leaves charcoal out and prints an RDA.

01 Does charcoal toothpaste whiten teeth?

The 2017 JADA review did not find enough evidence to support whitening claims for charcoal dentifrices. Marketing is not a measurement.

02 Is charcoal toothpaste bad for enamel?

Some products are abrasive, and abrasion can roughen teeth over time. The review did not assign one RDA to every charcoal paste. If a brand will not publish its RDA, you cannot compare it.

03 Does One+ contain charcoal?

No. The 16-ingredient list has no charcoal.

04 Is a low RDA the same as whitening?

No. RDA measures dentin wear in a lab test. One+ discloses 62. That is an abrasivity fact, not a shade change.

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Charcoal toothpaste.

Sources behind this answer

Charcoal and charcoal-based dentifrices

Toothpaste overview

One+ formula facts