Do snoring mouthpieces work? What the evidence shows

What’s going on

Snoring is the sound of tissue in the back of your throat vibrating as air flows past it. It often gets worse on your back, after alcohol, or with a stuffy nose. About 40% of adult men and 24% of adult women snore habitually, according to the AASM.

A jaw-advancing mouthpiece (also called a mandibular advancement device) holds your lower jaw a little forward while you sleep. That brings your tongue forward too, which leaves more room for air behind it. How jaw-advancing mouthpieces work explains the mechanics.

Snoring can also be a sign of sleep apnea. Not everyone who snores has it. But a mouthpiece that quiets the noise doesn’t tell you whether your breathing is normal.

What helps, and how well

The guideline

In 2015, the American Academy of Sleep Medicine (AASM) and the American Academy of Dental Sleep Medicine (AADSM) reviewed the research. They recommend oral appliances, rather than no treatment, for adults with snoring and no sleep apnea Strong. They rated the quality of that evidence as high.

The trials they found showed people snored on fewer nights per week and less loudly. The panel also said the evidence was too thin to say whether treating snoring improves other health outcomes.

Two details matter:

• The guideline says oral appliances fit people who’ve tried the simpler steps first. Those include weight loss Strong, sleeping on your side Some and avoiding alcohol Some.
• It says a sleep physician, not a dentist, should diagnose simple snoring, because snoring so often comes with sleep apnea.

Custom vs store-bought

The guideline is about appliances prescribed by physicians and fitted by dentists. It doesn’t rate store-bought mouthpieces for snoring on their own. The AASM’s patient site goes further: it doesn’t recommend over-the-counter devices. The ADA’s evidence brief reaches a similar view: the evidence is strongest for custom-made, adjustable devices.

One randomized trial compared a boil-and-bite device with a custom one in 35 people with mild sleep apnea. The custom device reduced snoring more.

About a third of people had trouble with the boil-and-bite, mostly because it didn’t stay in overnight. By the end, 82% preferred the custom one.

That doesn’t mean store-bought mouthpieces never help. It means results vary more, and fit is the weak point.

Real-world testing

In May 2026, Consumer Reports had four testers try eight snoring products, including mouthpieces, for at least two nights each. None of the testers found remarkable relief from any of them. That’s a small, short test, not a clinical trial, but it’s a fair warning against expecting a quick fix.

What limits an over-the-counter mouthpiece

• It’s cleared for snoring only. FDA-cleared store-bought mouthpieces are cleared to reduce snoring in adults. None is cleared to treat sleep apnea.
• No one checks your mouth first. A dentist would look for loose teeth, gum disease and jaw joint problems. The FDA lists loose teeth, advanced gum disease, central sleep apnea, severe breathing disorders and age under 18 as reasons not to use these devices.
• Fit depends on you. Boil-and-bite molding at home is less exact than a model made from a scan or impressions.
• No follow-up. Side effects such as sore teeth, jaw pain, extra saliva and bite changes are yours to watch for. See side effects.

Skip a mouthpiece if you’re under 18 or have central sleep apnea. The same goes for loose teeth, gum disease, dentures, braces, jaw joint problems, or recent implants or major dental work. The full list, with reasons, is on its own page.

How to give one a fair try

1. Rule out sleep apnea signs first: gasping, choking, pauses in breathing, or feeling tired after a full night.
2. Pick a design that suits your mouth. An adjustable one lets you start with a small jaw shift.
3. Mold it carefully and follow the maker’s steps.
4. Wear it every night for a few weeks. Ask your partner, or use a recording app, to judge the snoring.
5. Stop and see a dentist if a tooth hurts, your jaw aches, or your bite feels different.

What a dentist or doctor can do

If snoring continues, or you’re tired in the day, see a physician. They can decide whether you need a sleep test, and only a physician can diagnose sleep apnea.

If a physician orders an oral appliance, a dentist trained in dental sleep medicine can make a custom one. It’s adjusted over follow-up visits.

For people with sleep apnea, that custom route has evidence Some; a store-bought mouthpiece doesn’t. Over-the-counter vs custom compares the two.

Does a mouthpiece help sleep apnea?

A store-bought one isn’t the answer. No over-the-counter mouthpiece is FDA-cleared to treat sleep apnea, and quieter snoring doesn’t prove your breathing is normal.

A custom oral appliance is different. The AASM and AADSM guideline recommends one for adults with sleep apnea who can’t use CPAP or prefer another option. It still calls CPAP Strong the usual first choice, and it suggests a follow-up sleep test to confirm the appliance works.

If you’re unsure which group you’re in, the “Should I get tested?” checklist is a good place to start.

Ready to compare store-bought options? See anti-snoring mouthpieces compared.