NiteWhite 16% Carbamide Peroxide

This works very well. Been using it for years. I do it for two or 3 nights and let it alone for a couple of months.

Purchased many times - never disappoints

The product is very, very thick and doesn't distribute well in the custom tray that I have. The gel I'd previously gotten from my dentist worked a lot better. It was a much thinner gel that gooped around the tray and my teeth a lot better. I've been using this an hour a day for 2 weeks and don't notice any difference.

This really works and is safer to use than more aggressive whiteners. I highly recommend!

Exactly what I used to get from the dentist at three times the price!

I've been using carbamide peroxide for years with my retainer - using it 1 or 2 x year overnight. My teeth are very white and I have had no dental issues.

Not what you get from the dentist - does nothing. Used seven days in a row and no change, unlike what I have got from the dentist in the past which shows whitening in the first use.

There is no tray to put the gel into. The directions say to put in the tray and then into your mouth.