Opalescence Go™ - Prefilled Teeth Whitening Trays with Potassium Fluoride - 15% Hydrogen Peroxide - Mint

In my opinion this is the best economically over the counter teeth whitening kit available. The slim teeth molds come prefilled with the perfect amount of gel in them. For my mouth the top mold was a little high which after several uses irritate d my gum line. I discovered I could trim a little from the top %26 the irritation stopped. I was whitening my teeth to match a crown that was being made for a front tooth, which was 1.5 shades from the most white. Don't recall the %23. Personally I had great results with using the molds 5 days on, 1 off, 2 on, 1 off, then used 2 more (9 total). For upkeep I use the molds once per week. For me these were the closest to the getting custom molds made %26 a higher % peroxide solution from the dentist

This was sold out in amazon so i looked elsewhere and walmart had it! Also, it was significantly cheaper and free delivery! It was a day late bc we had heavy snowfall which I completely understand and came the next day. 10 out of 10 service, price and delivery. Oh, and these are the 15% so they dont go in as long. That said, they will be more intense then the 10% version which are to be kept in for 30-60mins (these 15% are only to go in for 15-20mins).

It actually worked pretty well. Theres 10 trays and I spaced them out so I did one every 3 days. My teeth weren't sensitive this way.

I first bought it at the dentist office and now I can buy online and use it 2-3 times a year. It really whiten your teeth in 3-5 days.

Opalescence is the best. Fast shipping %26 easy to use. This is the best price on Google! They are sold at our dentist's office that's how I learned all about them. Highly recommend.

Love this product! You see a big difference from day one . Five days into using the product your teeth look like you had a professional in office teeth whitening done. I highly recommend this product to anyone who is looking to brighten their smile without paying hundreds of dollars. So glad my local dentist recommended the product to me!!

Best one I've ever tried. It works!!

Package did not come on ice - product needed to be refrigerated so I'm not sure if this will cause trays to be less effective. Package insert and instructions from my dentist to store in fridge. Otherwise great.

I was so excited to try these because they were well reviewed online. First of all, these are really annoying to use. The lower teeth trays are great and stay on, but the upper ones are so poorly designed. I've tried making sure the whole area is dry and holding it, sucking it in like they suggested... nothing worked. So what happens? The gel falls out and you lose a ton of product. It sucks. Are my teeth whiter? Yes. Just a shade or two. Nothing super noticeable, and certainly not worth the price point.

I did the ten treatments as directed and possibly noticed a small lightening in my teeth, but nothing that "wowed" me. I probably wouldn't bother making another purchase unless I research that it does take multiple treatments of 10 days, and that may be the case.