Do Anti-Snoring Pillows Work? What Studies Found

What the 2024 review covered

The review that anchors this page is Moffa et al., published in the Journal of Personalized Medicine in 2024 (PMID 39063969). It gathered every study it could find on two related ideas: positional therapy — changing sleep position, including with specially designed pillows — and head-of-bed elevation for snoring. Nine studies made the cut, covering 235 people in total — snorers and people with obstructive sleep apnea (Moffa et al., 2024).

The headline finding is genuinely positive: across those nine studies, positional therapy (including anti-snoring pillows) and head-of-bed elevation reduced snoring. But the authors wrapped that finding in unusual candor for a medical paper. The evidence base, they wrote, amounts to a few short-term studies; the field needs properly controlled trials; and treatment decisions must rest on evidence, "not a simple commercial product" 1. That quoted phrase is doing a lot of work — it is the reviewers telling you, in so many words, that a pillow with a snoring claim on the box is not the same thing as a tested intervention.

Why snoring is worth studying at all

Some context on scale: the review's introduction notes that roughly 45% of adults snore occasionally and about 25% snore regularly; among snorers, around 40% are men and 24% women, with snoring rising after menopause (Moffa et al., 2024). Snoring is the vibration of relaxed throat tissues as air squeezes past — common, often harmless, and miserable for whoever shares the bed. That combination (common + harmless-ish + socially costly) is exactly why the market is full of products and the evidence is thin: demand far outruns research.

One more framing point before the trial-by-trial breakdown. These studies measured snoring — sound, frequency, duration — not sleep quality, not daytime alertness, not relationship harmony. A pillow that cuts the snoring index has done something real and measurable, but it has not been shown to make anyone sleep better or feel better the next day. Keep that boundary in mind as you read the numbers; the marketing will not.

Why only nine studies?

Nine studies is a small haul for a product category this large, and the reason is structural: anti-snoring pillows are consumer products, not drugs, so no regulator demands trials before sale and no patent clock funds them. Manufacturers can sell the claim without testing it, which removes the financial incentive to run the test. The result is a market shaped by marketing budgets rather than evidence budgets — and a 2024 review that could only find nine studies worth including across the entire literature on positional therapy and elevation for snoring (Moffa et al., 2024).

That context reframes what "the evidence says" means here. When a category has nine small studies and thousands of products, the absence of evidence for any given anti-snoring pillow is the default state — not a scandal, just the arithmetic of an unregulated market. The two honest positions are "this specific design was tested" (rare) and "this specific design was not tested" (nearly everything else). This page exists to keep those two positions from being blurred, because the entire business model of the category depends on blurring them.

The review sets the frame. Now the trials themselves — design by design, number by number. →

Which pillow designs showed a snoring drop

Here is the study-by-study table — the heart of this page and the complete published trial record on the anti-snoring pillow as a category. Every row is a real trial from the 2024 review, with what was actually tested (not what the box claims), who was in it, and how long it ran 2.

The two pillows with the clearest wins

Chen et al. (2015), published in Scientific Reports, tested a head-positioning pillow designed to encourage side-sleeping against a regular pillow in 25 people with snoring and positional apnea. After two nights, the median snoring index fell from 218 to 115 events per hour — a 34.4% drop (Chen et al., 2015, via Moffa 2024). Two nights is very short, and 25 people is very few — but a 34% measured reduction is not nothing, and it is the single strongest pillow result in the review.

Cazan et al. (2017), in Sleep and Breathing, ran the most careful design of the set: a randomized crossover in 22 snorers (BMI ≤30, each with a sleep partner, apnea excluded), four weeks on an active air-chamber pillow. The snoring index fell from 269 to 162.5 events per hour (p=0.03) without worsening other respiratory measures, partners rated snoring 7.2 down to 4.0 on a visual scale (p<0.001), and acceptance was 100% (Cazan et al., 2017). The crucial detail: this was an active, dynamic pillow — an air chamber that adjusts — not a shaped piece of foam with "anti-snore" printed on the packaging.

The two that complicate the story

Newell et al. (2018) tested a positional pillow in 28 people with positional sleep apnea. It did what positional tools do: supine (back-sleeping) time fell from 52% to 20.4%, and AHI dropped from 12.1 to 6.0. But the snoring-time percentage — 26.3% down to 20.4% — did not reach statistical significance (Newell et al., 2018, via Moffa 2024). A pillow can change position and even apnea numbers without measurably changing snoring: mechanism and outcome are not the same thing.

The incline studies split the same way. Danoff-Burg et al. (2022) put 25 snorers on a 12-degree incline base for four weeks and measured a 7% relative reduction in snoring duration (p=0.001) with fewer partner wake-ups (Danoff-Burg et al., 2022, via Moffa 2024) — real, but small. Lee et al. (2024) piloted 7.5-degree head-of-bed elevation as a randomized trial: AHI and RDI improved, but the snoring improvement missed significance (p=0.065) (Lee et al., 2024, via Moffa 2024). Near-misses are not wins; reporting them as "promising" is how thin evidence gets oversold.

You have seen what worked. Now — can you match the marketing claims to these findings? →

What it means for an ordinary pillow

This is the surprise the review hides in plain sight, and it is worth stating as bluntly as the data allows: the product category "anti-snoring pillow" has no trial behind it — only specific active designs do. Walk into the evidence with the question "do anti-snoring pillows work" and you walk out with a narrower, more useful question: "does this specific anti-snoring pillow's mechanism work?" The answer depends entirely on which mechanism the pillow in your hand actually uses.

Consider what that means at the shelf. A memory-foam pillow with a wave contour and "anti-snore" on the box shares nothing with the tested designs except the word "pillow" — it is an anti-snoring pillow in name only. Cazan's winner was dynamic — it moved. Chen's winner repositioned the head. A static shape, however ergonomic-looking, was not what produced the 34.4% drop or the 269→162.5/h fall. The reviewers' closing line lands harder once you see this: treatment must rest on evidence, "not a simple commercial product" (Moffa et al., 2024). Read again slowly — it is a peer-reviewed paper telling consumers that the product on the shelf is not the thing that was studied.

Mechanism beats shape. But what is the mechanism, exactly — why does position change snoring at all? →

Positional therapy: why position matters more than the pillow

Every positive result in the 2024 review runs through the same mechanism, so it is worth understanding properly. When you sleep on your back, gravity pulls the tongue and the soft tissues of the throat backward and downward. The airway narrows; air forced through the narrower passage vibrates the relaxed tissues — that vibration is the sound of snoring. Roll onto your side and the geometry changes: gravity now pulls those tissues sideways rather than into the airway, the passage stays wider, and the vibration eases. That is the entire theory behind positional therapy, and it is also why the successful pillows succeeded: Chen's repositioned the head toward side-sleeping, Newell's cut supine time from 52% to 20.4% (Moffa et al., 2024).

Two honest caveats come with the mechanism. First, not everyone can side-sleep: the review's discussion notes that some people cannot maintain the position — for example with ankylosing spondylitis or shoulder or hip pain — and that steep head-and-trunk elevation above about 35 degrees is poorly tolerated over a whole night (Moffa et al., 2024). A mechanism you cannot sustain is not a treatment, and no anti-snoring pillow changes that constraint. Second, positional snoring is a subset: if you snore thunderously on your side too, position is not your mechanism, and no positional anti-snoring pillow — tested or not — addresses it. Knowing which kind of snorer you are is more useful than knowing which pillow is popular.

If back-sleeping is your pattern, the natural next read is the mechanics in full: our guide on why back-sleeping causes snoring — including how to tell whether position is really your trigger. (See the Keep exploring cards below.)

Position is one lever. Elevation is the other — and the incline trials are a study in small effects. →

Head-of-bed elevation: what the incline studies found

Elevation is positional therapy's quieter sibling: instead of turning the sleeper, you tilt the whole upper body. Danoff-Burg et al. (2022), published in JMIR Formative Research, gave 25 snorers a 12-degree incline base for four weeks. Objectively measured snoring duration fell 7% in relative terms (p=0.001) — a real, statistically solid, small effect — and partners reported fewer wake-ups (Danoff-Burg et al., 2022, via Moffa 2024). Seven percent will not transform anyone's nights, but it is measured rather than wished for, which puts it ahead of most of the market.

Lee et al. (2024) went gentler — 7.5 degrees of head-of-bed elevation in a randomized pilot — and got a split result: AHI and RDI (apnea-related measures) improved, but the snoring improvement did not reach statistical significance (p=0.065) (Lee et al., 2024, via Moffa 2024). A p-value of 0.065 is the statistical equivalent of "almost" — interesting, not convincing, and exactly the kind of near-miss that marketing departments round up to a win. We report it as what it is: not a win.

The practical ceiling matters here. The review's discussion warns that head-and-trunk elevation above roughly 35 degrees is poorly tolerated long-term — people slide down, backs ache, sleep fragments (Moffa et al., 2024). The tested inclines (7.5 and 12 degrees) sit well below that ceiling, which is reassuring for tolerability and sobering for expectations: the comfortable doses are the small-effect doses. Wedge pillows live in this territory too — an anti-snoring pillow by incline rather than by contour — which is why the honest question about them is the same mechanism question: do wedge and contour positional designs hold up? Our comparison applies the same trial-by-trial standard.

Small honest effects. Now the boundary the whole page has been circling: what about sleep apnea? →

Can anti-snoring pillows help with sleep apnea?

This question — "can anti-snoring pillows help with sleep apnea?" — is one of the most asked about this topic, and it needs the unambiguous answer first: no. Snoring and sleep apnea share a neighborhood (the throat, at night) but they are not the same condition, and nothing in the 2024 review tested a pillow as an apnea treatment. Newell 2018 comes closest — it enrolled people with positional apnea and improved their AHI from 12.1 to 6.0 — but its snoring outcome missed significance, and improving a number in a small trial is not treating a disease (Newell et al., 2018, via Moffa 2024).

The deeper reason is diagnostic, not mechanical. Sleep apnea can only be diagnosed with objective sleep testing — that is the consistent position of clinical guidance — and its treatments are medical decisions. An anti-snoring pillow that nudges you onto your side may be compatible with apnea care; it is not a substitute for it. The day a pillow box claims otherwise is the day to put the box down.

Two related reads, depending on which side of the line you are on. If you are trying to sort out whether your snoring might be something more: how do you tell snoring from sleep apnea? — the signs that suggest testing, including the ones women often miss. If you are asking the question from the apnea side: can a pillow help sleep apnea? what the guidelines say — education only, no product framing, because apnea is never something a pillow treats.

The apnea line is drawn. What remains is the fine print on everything above. →

Limits of this evidence

Publishing a page whose main conclusion is "the evidence is thin" might seem like an odd editorial choice. It is the opposite: a site that only publishes confident verdicts is a site you cannot trust when it says "we don't know." The anti-snoring-pillow literature is small, short, and commercially entangled — and now you know exactly how small, how short, and where the entanglement starts. That is more useful than another listicle confidently ranking untested foam.

The limits are on the table — now the exact questions readers ask, answered briefly. →