Sweeteners · Aspartame, Saccharin, Acesulfame K

Artificial Sweeteners

A toothpaste has to taste pleasant, or it will not get used. The question is what to sweeten it with. Synthetic sweeteners and natural polyols have different reputations — and different benefits.

QDRO position

We avoid it

Synthetic sweeteners are best avoided in toothpaste. Aspartame is classified by IARC as Group 2B; they offer no functional benefit for the mouth. Xylitol and erythritol, with a proven anti-caries effect, are the sound alternative.

A sweetener in toothpaste is not a whim. If a product tastes unpleasant, people simply will not use it twice a day — and regularity is half the success of oral hygiene. So the question is not "to sweeten or not," but "with what." And here the choice between synthetic sweeteners and natural polyols is far from neutral.

What Substances We Are Talking About

The most common synthetic sweeteners in personal care products:

Saccharin (Sodium Saccharin) — the classic intense sweetener, historically the most common in toothpastes.
Aspartame (Aspartame) — found in a number of toothpastes and mouthwashes.
Acesulfame potassium (Acesulfame K) — often used in combination with others.

All of them provide sweetness without sugar and without caries risk. That is true. But "does not directly harm teeth" is not the same as "beneficial."

What Changed

In July 2023, IARC classified aspartame as Group 2B — "possibly carcinogenic to humans." This is a cautious category, and in parallel the JECFA committee confirmed the acceptable daily intake of 40 mg/kg — meaning this is not about panic, but about reconsidering the substance.

In the same year, 2023, the WHO issued a recommendation against using non-caloric sweeteners for weight control, against a backdrop of accumulated data on their ambiguous effect on metabolism.

A separate and still-emerging area is the effect of sweeteners on the microbiome. Some studies point to a possible change in microflora composition; the data is still preliminary, and it is too early to transfer it directly to the oral cavity. But when an equivalent substitute exists, it makes sense to choose the option without open questions.

What to Use Instead

And this is the key point: we have a substitute that is not merely safe but beneficial. Xylitol and erythritol are natural polyols that sweeten toothpaste while also:

not being fermented by cariogenic bacteria;
xylitol, according to Cochrane, has a proven anti-caries effect;
erythritol is well tolerated and leaves no aftertaste.

In other words, giving up synthetic sweeteners costs nothing in taste — and gains a functional benefit. Xylitol, erythritol, and stevia extract are the sound sweetening choice, not aspartame or saccharin.