Colgate Max White Overnight Teeth Whitening Serum, 2.5ml | Teeth Whitening Pen, Reverses 15 Years of Stains* While You Sleep, Enamel-Safe Whitening Serum with Precision Applicator

After just 3 nights using it, i can see a very subtle difference so I am already very happy. I used to smoke for 20 years then switched to vaping, so my teeth were unfortunately a bit yellow. I'm glad i bought this so I can have the confidence to smile more. If I can see a difference after 3 days then I look forward to how it looks after 30. You have to make sure you dry your teeth after brushing, then apply the serum, then make sure it dries. Don't put too much on because it'll get onto your gums and can irritate them.

Takes a lot of separate applications to make a little difference. I did a comparison by doing just my top set of teeth only so could do a direct comparison with the bottom, untreated set of teeth - to see if it actually works. Yes, but very subtle, but then again, the advert pic - before and after - is not a dramatic difference anyway.: and that is the level of shade difference I saw on my teeth. Application wise - the gel is clear, so cannot see if missing bits when applying it - and also, will be difficult to see when it has actually run out, as cannot see if there is any on the brush - I am still using mine after a couple of weeks and it could be that there is nothing left and i am just using the brush against my teeth with nothing on it! So will just have to decide on a day to stop, Would be better if the gel was coloured, as you are using it overnight in bed, so would not really be an issue with a coloured gel.

Does seem to whiten teeth. It's a bit awkward getting the knack of how to apply this properly. It involves drying you teeth, applying then leaving it to dry for a bit. And you have to brush your teeth as soon as you wake up because it dries hard and gritty on your teeth. It's worth a go though. Only been doing it for a few weeks, so no drastic change yet. Buy teeth do look a bit whiter.

Nice

Absolutely useless waste of money, just leaves chunks of white stuff on your teeth that didn’t come off with using an electric toothbrush I had to scrape it off, don’t bother wasting your time or money on it

I’ve used this product every single night for four weeks, following the instructions to the letter. Although it does seem to have removed a couple of stains, my teeth are certainly no whiter than they were before I started using it. It is easy to apply, although if you put too much on it does dry in a clump which can be a bit of a pain to remove. I’m sure it works for a lot of people but, unfortunately, it hasn’t worked for me so I won’t be buying it again.

So easy and difference noticeable after one night 🥰

Good quality good value good texture no oral irritation

It is not working