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If you've got a machine then you probably already know this, but I was told by a doctor at a sleep apnea clinic that those appliances can be successful for women though the ones they sell actually cost more than the machines.

He also told me that the appliances usually don't do anything for men.

I took the test but didn't need anything so I don't think I was being upsold, but it's only what I was told by one doctor at one clinic.

In general if a website for a medical device has a section for reviews but not one for scientific studies, that's a huge red flag.

EDIT: Yeah when they have stuff like this on their site: "Cleared by the US FDA to reduce snoring in adults" it just SCREAMS vortex energy bracelet. Cleared does not mean it's effective, it just means using it won't poison you or suffocate you.