Teeth Whitening Gel Refill 4X Syringes 44% Carbamide Peroxide

I have been using this for the last year, works great.

It works.

Leaves black bits on tray

Fast delivery

Too much gel comes out at one time - even when slowly pushing the syringe plunger. The syringe hole needs to be smaller. I’ve only used it three nights and so far there’s been no change in my teeth color.

Nearly no results after two tubes of this stuff. Also the black syringe plunger is breaking down and spreading black bits throughout the product. I've used Opalescence in the past and it worked fantastic but thought I'd try this instead. Learned my lesson and will stick with what works.

I love these! They have the highest amount of carbamide peroxide to bleach your teeth. I bleach my teeth with these 1/2 hr at a time. It works better if you can keep it on longer than 10min. If I only used it 10min at a time, I’d have to buy 3 boxes. So I’m ok and my teeth are ok w using it for a half hour w my led purple light/ mouthpiece.

This product is great, been using it for years. Have tried many other brands but nothing compares based on my experience.