GLP-1s and Your Teeth: Erosion, Dry Mouth and Breath, by the Evidence

The short version

"Ozempic teeth" is searched thousands of times a month and is not a thing the drug does to your enamel directly. There is no dental adverse reaction on these labels.

The risk that is real is indirect, and it runs through two effects that are on the labels: vomiting and acid reflux. Acid is what damages teeth, and these medicines can increase how much of it reaches your mouth. Meanwhile the one direct oral effect that is documented — dry mouth — is small, and appears on one label and not the other.

And there is a genuinely surprising strand of research pointing the other way, which I will treat with the caution it deserves.

What the labels actually report

I read the current prescribing information rather than repeating what circulates.

Dry mouth. The Zepbound label reports dry mouth or dry throat in 1% of patients against 0.1% on placebo¹. That is a real signal and a small one. The Wegovy label does not mention dry mouth anywhere at all². So if you are on semaglutide and your mouth feels dry, that is not something its trials recorded.

Reflux and vomiting. Both labels list gastroesophageal reflux disease as an adverse reaction, and both discuss vomiting extensively¹². This is where the dental story actually lives.

Teeth. Neither label lists a dental adverse reaction. Not erosion, not decay, not sensitivity.

Why the indirect route matters more than the direct one

Stomach acid dissolves enamel. That is not controversial and it is not new — the association between gastroesophageal reflux and dental erosion is established in the dental literature³.

So the chain is: a medicine that slows gastric emptying makes reflux more likely for some people, and can cause vomiting during dose escalation, and acid arriving in the mouth repeatedly wears enamel. The drug is not attacking your teeth. The acid is, and the drug can increase the acid.

That reframing matters because it changes what protects you. If the mechanism were the drug itself, there would be nothing to do. Because the mechanism is acid exposure, there is quite a lot to do — and one thing not to do.

Do not brush immediately after vomiting or a reflux episode. Enamel is softened by acid, and brushing it in that state removes more of it. Rinse with water, wait, then brush. This is standard dental advice for anyone with reflux or vomiting, and it is the single most useful sentence on this page.

The breath question

"Ozempic breath" is searched heavily and is usually a different mechanism again.

Halitosis is common — a review of oral malodour puts it at up to 30% of the population independent of any medication — and in most cases it originates in the mouth, from anaerobic bacteria producing volatile sulphur compounds, frequently living in the coating on the tongue rather than in the gums⁴.

Volatile sulphur compounds are the same family of molecules behind the sulfur burps people describe on these drugs, which is probably why the two get conflated. The practical difference is that oral malodour responds to oral measures: brushing, and specifically cleaning the tongue by brushing or scraping it⁴. If your breath changed and your mouth is also dry, the dryness is worth addressing too — saliva is what normally keeps that bacterial load down.

The finding that points the other way — handled carefully

Here is where I want to be precise rather than exciting.

A 2025 review in the Journal of Periodontal Research concluded that GLP-1 receptor agonists improve periodontal and peri-implant health in type 2 diabetes⁵. Taken at face value that is the opposite of the panic.

But read what it is built on: the review evaluated 10 in vitro studies, nine preclinical animal studies, and exactly one clinical study⁵. That is a body of laboratory and animal work with a single human study attached. It is a reasonable hypothesis — better glycaemic control plausibly means better gum health, since the diabetes–periodontitis relationship is well established — and it is not yet a finding about people.

I am including it because it is the best-quality signal that exists in either direction, and because a reader deserves to know the research is not uniformly alarming. I am not including it as reassurance.

What to actually do

• Rinse, do not brush, straight after vomiting or reflux. Wait, then brush.
• Tell your dentist you are on it. Not because the drug harms teeth, but because reflux and vomiting change what they should be looking for, and erosion is much easier to catch early than to reverse.
• Treat dry mouth as a dental issue, not a comfort issue. Saliva protects teeth; less of it means more risk. Water, sugar-free gum to stimulate flow, and a conversation with your dentist about fluoride.
• For breath, clean your tongue. It is where the volatile sulphur compounds mostly come from.
• Do not sip acidic drinks all day to fix dry mouth. That is trading one acid exposure for another.

For adjacent evidence: managing the side effects day to day, what happens to skin, and the hair-loss evidence.