Colgate Max White Overnight Teeth Whitening Serum - Home Teeth Whitening Pen - Reverses 15 Years of Stains* While You Sleep - New and Improved Applicator - Enamel-Safe - Easy to Use

So easy and difference noticeable after one night 🥰

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.

Good quality good value good texture no oral irritation

Tried this product on the basis of the reputation of the brand and other positive online reviews. I wanted to try an alternative to whitening strips, as the brand I have recently bought is quite pricey. Compared with the other brand, this serum and ease of application has been really disappointing. The serum, if coming into contact with my lip is quite uncomfortable. It is also difficult to know if coverage is sufficient when applying, and it can dry in sticky lumps on the teeth, which needs a good toothbrush the following morning to remove. My teeth also feel quite sensitive after application. Overall I am not convinced that the serum is having any whitening of the teeth, it is subtle at best. Won’t be buying again.

I used it only once and couldn’t get myself to try again!

does the job spot on

Works surprisingly well Great for the odd darker tooth but is also amazing for overall use A but hard to brush off but easily pick off with nails + I have sensitive gums and this did NOT harm them at all

It is not working