Opalescence 15% Gel Syringes Teeth Whitening Refill Kit - Low Sensivity (2 Packs / 4 Syringes) - Cool Mint - Carbamide Peroxide - Made in The USA by Ultradent Tooth Whitening 5195-2

Opalescence 15% Gel is less expensive on Amazon. I paid double at my dentist's office. I have used this brand for over 8 years. At the beginning I used the gel once a week. My teeth would get very sensitive to cold if I used it more than once a week.After my teeth were whitened, I cut back to using it once a month.I ran out of the gel over four months ago, but I was still getting complements about my straight white teeth.I was uneasy about ordering the gel from Amazon because of the low price. All my doubts were gone after one application! My teeth are noticeably lighter.Here's a tip: Do not waste gel by over filling the mouth trays. To avoid getting the gel all over your tongue, try spreading a light coat of gel with the tip of the syringe only to the areas of the trays that come in contact with the front of your teeth.

It works and if you have the mold made thru your dentist perfect whitening.You should not use without as it can burn your gums!

I saw online that I could use this whitening gel with my invisilign trays, it was recommended to use only 10% or 15% for all night and it works great, removes those coffee stains from my teeth.

Love this tooth whitening gel! Easy to use, gentle on gums, and tastes fresh. Noticeably whiter teeth after just a few uses. Highly recommend for a confident smile

I have had significant difficulty over the year finding a teeth whitening product that my teeth were not sensitive to. I would use strips or gel for a few hours and the pain in my teeth would be so painful I had to stop. I didn't think I could ever have white teeth, and I really wanted white teeth. So I saw this product online and decided to try the 15% strength, since my teeth are generally sensitive. I have plastic trays anyways since I did invisiline and so I tried it with my trays for a few hours. No sensitivity, no pain. I tried it again for a few hours and again, no sensitivity, no pain. I could see a slight whitening, even after a few hours of use. Then I decided to try it overnight (since that's what the instructions said) and again, no sensitivity, no pain. I have ordered this product 3 times (used almost 10 tubes), and my teeth are, without a doubt, white. The attached photo shows it to some degree, but in real life they are flat out white. So for about $100 I finally got the white teeth that I have always wanted. I have so much confidence now smiling and laughing, knowing that my teeth look fabulous. And I don't know what it is about this product versus others that I have used, but I am so thankful for the formulation. Great product!

LOVE this item! I got the exact same brand from my dentist's office but at a much higher price with them. I found this same brand on Amazon (with different levels of options) at a lower price and knew this is what I needed to get. Comes in 2 packs of 2 syringes. I generally use this every other night (I don't want my teeth to get too sensitive) and the tubes last me a good while. I'd say I can get at least 3 days out of 1 syringe (using on both top and bottom, all teeth). Flavor is decent. Stays put all night in my retainers and actually whitens! I don't have a shade test, but they are many shades whiter now. I am very pleased with this product.

I love that product. You can see a result after first day of using this

Not sure how to give 3-1/2 stars. I have ordered this before and LOVED it, as it -- at the time -- whitened quite well. But the last 2 times I have ordered it -- particularly this very last time -- it has been unusually "gummy" and therefore difficult to spread within the trays. It makes me concerned about whether it will be whitening the entire tooth, or not. An indded, it USED to work quite wonderfully at WHITENING my teeth. But the last 2 times I have bought it, it truly did not do as good a job. Essentially the SAME gel, bought through my dentist's office at a higher price, has worked MUCH better. I wonder whether this is "old" or didn't pass certain inspections or . . . what? Has anyone else had "erratic experiences" with this?