BUT, Buyer Beware. If you are like me I have never read the warnings on the back of the box or tube. It says to Not use longer than 6 weeks unless advised by Dentist. Who would have known??
Toothpaste really works but am very weary about using longer than advised, so have switched to other toothpaste for awhile.

At the beginning it was fantastic, but at some point my teeth start to look stained and incredibly yellow, in an unhealthy way: don't drink coffee, don't smoke and nothing wrong with my oral hygiene.

My mum purchased this toothpaste to try it out (thankfully, I didn't spend the money on it!) and didn't like the texture so she gave it to me. My teeth are in pretty good shape for a 28 year old, but I have noticed that more recently they are not looking as white (probably from drinking too much tea!) and I was looking forward to seeing if this product was any good. When I began using it, I also was turned off by the texture (very gritty) but figured if it works well, that's all that matters. The tube says that you will have a whiter smile within one week, but to use it for four weeks for the best results. I have been using this toothpaste, solely, every morning and night and can honestly say I have not noticed ANY improvements whatsoever. I have been using this toothpaste for about a month now and I swear (maybe this is just my imagination, but I'm sure it isn't) that my teeth actually look a little dingy ever since I started to use this toothpaste. I will definitely not be recommending this product to anyone!

It didn't work instantly but I've been using this since may, works better with electric tooth brush and since buying one I'm noticing better results (:

As a smoker & heavy coffee drinker, it is really important to me to have a really effective whitening toothpaste. Colgate Optic costs less than the others and is just as effective. My teeth stay whiter than with regular, non-whitening toothpastes (and even some whitening brands).

J'ai remarqué une bonne différence avec ce dentifrice: les dents blanchissent vraiment ! Je n'avais pas vraiment les dents jaunies au départ mais j'ai remarqué plus d'éclat !

I found that the crest 3d white toothpaste works a lot better, this one I found didn't do a lot I noticed a bit more white within a week but that was about it.

I have been using this toothpaste for a couple months. It can get on the pricey side of toothpastes but it does show results. My teeth have a slight yellow tint but after using this product i can see a difference in my teeth. It also leaves you feeling fresh every time!!

I love using Colgate optic white tooth paste. It always leaves my mouth feeling fresh and clean. It helps keep my teeth nice and white.

I have used this before and then switched to another tube of toothpaste recently i started using Crest optic white again and there is a noticeable difference in the whiteness and brightness of my teeth.