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2,223
4.5 out of 5 stars

Top positive review
10 people found this helpful
Whitened at least one shade after only 15 minutes on my first try
By Mommy on Reviewed in the United States on June 30, 2025
I used Opalescence years ago as a Dental Assistant before we could buy online and it was my favorite. I tried this for only 15 minutes to check sensitivity and it honestly whitened at least one shade with no sensitivity. Oh the glory of carbamide peroxide! *Please note*You only need one tiny drop in each facial side of your trays in the tooth-groove. It will liquify and surround the surface of teeth. If you use too much, you run the risk of getting on the gum surface and it will cause irritation. Start slowly if you have sensitivity. This stuff is awesome
Top critical review
DO NOT USE WITH SENSITIVE GUMS
By Elliott Burrow on Reviewed in the United States on July 11, 2025
I’ll give it 3 stars because it definitely whitened my teeth so well, but holy moly did it burn the snot out of my gums within five minutes. I currently have a chemical burn on them. I would not use this in ANY WAY if you have sensitive gums. Stick to your trusty whitening strips.

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