Nearly half of regular nicotine pouch users had receding gums in a new Swedish study — the first to compare tobacco-free pouches head-to-head with traditional snus for oral damage.

The Karolinska Institute study examined 272 adults aged 18 to 30: 126 nicotine pouch users, 63 snus users, and 83 non-users. Researchers found gingival recession — gums pulling back from the teeth, exposing sensitive roots — in 45% of pouch users, 52% of snus users, and just 6% of non-users. The recession tended to appear right where users park the pouch.

The study is published in Oral Diseases (DOI: 10.1111/odi.70409).

What the study found

Oral lesions showed up in 79% of nicotine pouch users and 89% of snus users. But the type of damage differed: nicotine pouch users had more erythema (redness) and reported more oral symptoms, while snus users showed more hyperkeratosis — a thickening of the tissue.

Strikingly, pouches caused more gum irritation and discomfort than snus. Lead researcher Karin Garming Legert points to flavourings as a likely culprit. Pouches are often minty, she notes, and mint flavours are "complex mixtures of chemical constituents, as well as synthetic cooling agents" that may irritate sensitive oral tissue. A non-significant trend suggested mint-flavoured pouches were linked to more pronounced lesions.

There was one reassuring finding: no increased risk of tooth decay or periodontal (gum) disease was observed for up to six years of use.

Why it matters

Receding gums don't grow back. The exposure can lead to tooth sensitivity, higher decay risk, and in severe cases tooth loss. For daily users who place the pouch in the same spot each time, the localised pressure and chemical contact appear to add up.

Gita Gale of the University of Gothenburg cautioned against assuming pouches are harmless, even if they're likely safer than smoking. "Almost all tobacco-free pouches that are sold in Sweden derive from tobacco leaves," she noted — a reminder that "tobacco-free" doesn't mean inert.

Legert is blunt about the bigger picture: "Although the absence of tobacco eliminates exposure to many well-established tobacco-specific carcinogens, this should not be interpreted as evidence of long-term safety."

Where this fits in the evidence

A separate systematic review published in Acta Odontologica Scandinavica in February 2026 (Bankvall and Jontell, University of Jönköping and University of Gothenburg) combed through 2,176 studies and settled on 26. It concluded that Swedish snus is associated with gingival recession — especially loose snus — and with more gingivitis even after accounting for plaque. It found no significant link to periodontitis, inconsistent evidence on cavities, and a 48% higher risk of oral cleft malformations in children of mothers who used snus during pregnancy.

Crucially, that review flagged tobacco-free "white snus" (nicotine pouches) as a genuine gap: the long-term oral-health evidence for pouches specifically is still thin. The Karolinska study is one of the first to start filling it.

What the study doesn't tell us

It's cross-sectional — a snapshot, not a trial — so it can show association but not prove pouches caused the recession. Participants were aged 18–30 and recruited from nine dental clinics, so the findings may not represent older or more casual users. The study looked at up to six years of use; longer-term effects remain unknown. And while the mint-flavour trend showed up, it wasn't statistically significant.

The study also didn't assess systemic effects beyond the mouth — something Legert says now warrants investigation.

What pouch users can do

Receding gums are irreversible, so prevention matters more than treatment. Practical steps from the findings and dental guidance:

• Rotate placement. Don't park the pouch in the same spot every session.
• Limit session length. Shorter contact means less localised stress on the tissue.
• Watch mint and cooling-agent-heavy flavours if you notice irritation — the data hints, though doesn't prove, that these are harsher.
• Get a gum check. If you use pouches daily, ask your dentist to check for recession at your next visit.

This is early evidence, not a verdict. But it chips away at the idea that pouches are simply a "cleaner" version of snus with no oral-health trade-off.

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SOURCES:

• Legert KG, Daneshian M, Fredriksson L, Skott P. "Oral Lesions and Dental Status in Individuals Using Oral Tobacco-Free Nicotine Pouches." Oral Diseases, published 1 July 2026. DOI: 10.1111/odi.70409
• New Scientist: Nicotine pouches may cause receding gums (15 July 2026)
• University of Gothenburg: Snus linked to gum damage – gaps in knowledge about white snus
• Bankvall M, Jontell M. "Swedish smokeless tobacco and its impact on oral health: a systematic review." Acta Odontologica Scandinavica, Vol. 85 (2026), published 6 February 2026. Acta Odontologica

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