Opalescence 35% CP Mint - Gel Syringes Teeth Whitening - Refill Kit (2 Packs / 4 Syringes Total) Carbamide Peroxide Gel. Made by Ultradent. Tooth Whitening Refill Syringes 5197-2

I smoked right after and no sensitivity first time using it in a tray as well. This100% did lighten my teeth, I recommend there tooth paste the sensitivity one. Also watch out for gum burns I did on accident but the pain was only like a annoying 5-6

This was my first time trying at-home whitening, and I have to say I’m pleasantly surprised! These are my results after 5 uses, only leaving the gel on for ~1 hour each time! I did end up buying trays on here as well, as the kit doesn’t come with any and only the 4 syringes of gel—something to keep in mind! Also the other comments about it burning your gums are very true—you have to be super careful when applying!

Cut out the middle man in your dentist/orthodontist. These are legitimately the exact product that my dentist was trying to sell in-office for 3x the price. High quality product; works perfectly for a fraction of the price.

This brand never disappoints! I finally finished with my Invisalign treatments and now have to wear retainers when I go to bed. So whenever I need a little whitening I use these gels and they work! Beware that if you do have sensitive teeth like me you might have to do less than 30 minutes. Taste of the gel is not very good but I can overlook it to get the results I want.

Works well! It’s super strong and burnt my gums, it hurt and turned them white which was scary! I came up with the idea to put the gel on a q-tip, put it on my teeth and then I insert the retainer that way it never touches my gums, works perfectly!

Same product my dentist sell, but Amazons price is so much lower.

After completing my orthodontic treatment, the orthodontist “gave” me a Peroxide-based 20% ten-day treatment system. But I didn’t get the results I wanted. So I called my dentist to see what they had, and they had this exact same product, but they would create the liners too for $540! It was the same treatment, but I already had the liners. So for $30, this was a no brainer.After a few treatments, I can see the biggest difference. I may just use a few more, but let’s face it, I’m not going with the “Ross” look (from Friends). My teeth have been more sensitive throughout my two+ year orthodontist process, but I haven’t had any sensitivities since completing the process. The only caution that I would give (like the others) is it will bring the gums. So here’s what I’ve done:Apply a very small bead in the center-front of each tooth imprint of the dental trays/liners. The line seems to be too much. Add a coating of vasoline around your gums with either your finger or a q-tip. Then apply. If you do feel it burning your gums, simply pull off, and use a soft- white toothbrush on the area of the liners/trays to remove the gel from the are closest to your gums. Simple. I was able to tolerate it for the full 30 minutes. Would highly recommend, but definitely use a very small amount and use with caution! I’m so happy with my newly straightened, whitened teeth! In the words of Buddy the Elf, smiling’s my favorite! Now I can smile with confidence!

The only teeth whitening product i've used that actually works. I have recommended this to so many people, any time i get compliments on my teeth being white.