Opalescence 45% Syringes Teeth Whitening Gel - with PF - (4 Syringes) Refill Kit Carbamide Peroxide. Made by Ultradent, in Mint Flavor. Tooth Whitening 5359-2

Demasiado bueno me dejó los dientes hermosos y blancos me encanta el modo de aplicar debe de ser con mucho cuidado para no dañar tus encías gracias a este producto quité mis manchas de café desde hace muchos años me encanta ese producto gracissss me encantó lo súper recomiendo

Noticed immediate results with the first use!

I have sensitive teeth. For me using the strong for one or two days works better than using a low percent over a few weeks. I am a hygienist and the doctors always recommend the later techique, but I tell my patients to try what I do. Love this brand too!

As a hygienist, I love this brand! We sell it in our office but only the 35% and at a higher cost with less product. I tell all of my patients to buy it through Amazon for that reason. I never recommend the 45% unless it's a savvy patient. Stick with the 35% if your new to it.

Working but will need few treatment this single treatment will not be enoughEasy to use just be gentle with syringeCan irritate gum so avoid getting it on it

Whitens teeth to a long lasting beautiful smile. I have been using this product for several years. Highly recommend.

Love this stuff, makes my teeth super white

These do lighten your teeth, but not like movie star white. I use them with fitted trays I got from dentist. They do cause teeth sensitivity though so wait a few days in between uses. I wanted something a little stronger because I got the 35% from my dentist and it wasn't lightening like I'd hoped. These whiten a little better I guess, but again not as much as I wanted. Might get better with more uses.