Oil Pulling: A Real Signal for Your Gums, Graded Very Low. Mouthwash Still Beats It on Plaque.

Something unusual happens when you look up oil pulling.

Thirteen videos on the subject carry over eleven and a half million views between them — and four of the top five are dentists. One of the biggest is a dentist video titled, more or less, the truth about oil pulling.

On most trends we check, the professionals are nowhere near the top of the results. Here they turned up in force, which usually means one of two things: either there is something worth correcting, or there is something worth explaining.

In this case, both.

It is not nonsense. Start there.

A 2024 meta-analysis pooled 25 trials covering 1,184 people, assessed with the standard risk-of-bias tool and graded formally. [1] That is a reasonable body of research by the standards of anything else on this site.

And it found something. Compared with ordinary mouthwash, oil pulling improved gingival index scores — a measure of gum inflammation — with a standardised mean difference of 1.14. On the usual scale, 0.2 is small, 0.5 moderate and 0.8 large, so that is comfortably large.

Swilling oil around your mouth for ten minutes appears to do something to your gums. Which is more than we can say for a lot of what gets sold in bottles.

Now the three problems

One: mouthwash still wins on plaque. When oil pulling was compared with chlorhexidine — the antiseptic mouthwash dentists actually prescribe — chlorhexidine came out ahead on plaque reduction. [1] The reviewers say so plainly: chlorhexidine remained superior.

Two: the reviewers do not trust their own result very much. Their assessment of the whole body of evidence, in their words: “The overall quality of the body of evidence was very low.” [1] That is the bottom grade. It means the direction might be right, and it might not survive better trials.

And there is reason to take that seriously, because an earlier and stricter review looked at the same field and found less. Screening down to five randomised trials in 160 people, it reported no significant difference in plaque scores in three studies, and no significant difference in gum scores versus chlorhexidine in two more. [2] Same practice, tighter filter, nulls.

Three, and this is the one nobody mentions: most of the people studied had nothing wrong with their mouths. Seventeen of the twenty-five trials enrolled participants with no reported oral health issues. [1]

Which makes the results harder to use than they look. If you already have healthy gums, a study showing improvement in healthy gums is not telling you much about what happens to yours.

The two claims with no evidence at all

Here is where the gap between the research and the videos gets wide.

The trials measure four things: plaque, gum inflammation, bacterial counts, and bad breath. That is the whole list.

We searched for studies on oil pulling and tooth whitening. We found none. We searched for oil pulling and drawing out toxins. We found none there either.

Those two claims — a whiter smile and toxins pulled from your body through your mouth — are doing most of the promotional work, and neither appears anywhere in this literature. Not refuted. Never studied.

The toxin story in particular has the shape we keep meeting: a system described as clogged, and a product that unclogs it, with nobody naming the substance being removed. It is the same sentence sold by detox teas and castor oil packs.

The safety point, which is small but real

Oil pulling is not dangerous. It is oil, and you spit it out.

The genuine risk is substitution — ten minutes of swilling replacing two minutes of brushing, or replacing a dental appointment for gums that have started bleeding. None of the trials tested oil pulling instead of normal oral hygiene, and bleeding gums are a reason to see a dentist rather than to buy a bigger jar of coconut oil.

The verdict

Preliminary. Twenty-five trials found a real and reasonably large effect on gum inflammation, which is a genuine finding and more than most kitchen remedies manage. But the people who did that analysis graded their own evidence very low, a stricter earlier review of the same practice found nulls, prescription mouthwash still beats it on plaque, and most participants had healthy mouths to begin with.

That is the definition of unresolved. Something is here; nobody can yet tell you how much it is worth.

The practical version: if you enjoy it and it is on top of brushing and flossing rather than instead of them, there is a plausible case and no downside. If you are doing it for whiter teeth or to draw out toxins, those claims have never been tested at all.

Related: honey for cough, the other kitchen remedy that turned out to have real trials behind it, and beef tallow for skin — the same natural-is-better pitch, with a much thinner file.

If you want to know what earns each rating, we wrote down how we read a study, and everything we have checked is in one place.