Smile Science Harley Street Teeth Whitening Pen 1-Pack - Peroxide-Free Gel for Sensitive Teeth, Fast Tooth Whitener, Vegan Formula, Mint Flavour (2.5ml)

I've had a few Zoom whitening and home whitening treatments before so I used this whitening pen as a top up treatment to give my teeth a quick refresh. It was a great on-the-go product, you can pop it in your handbag or make-up bag if you're travelling with no fuss. I loved how easy it was to use and it didn't cause any sensitivity in my teeth or gums. It gave my teeth a quick brighten and sparkle which was perfect!

I purchased this after reading a positive review in a Sunday paper. What the review did not say was that there is only 2.5ml in the pen which - as the company have now told me - is only enough for 5 - 7 uses! I used it twice a day per the instructions on the pack for 2 days and then it ran out so have no idea if it would have worked if used for longer. Definitely not a good buy.

I have not long had this product so I am unable to give a final review. The product was delivered quickly and tried it straight away, it's very easy to apply to teeth with no lingering aftertaste. After a couple of applications I can see a slight improvement in colour but need to use the product fully before I can properly evaluate.

Easy to use, but so little liquid in the pen it seems pointless using. With what little whitening liquid there was my teeth did look slightly more white, but this looks like just a temporary measure.

Have not seen or used a product like this before. The application process took a little getting used to but once applied a few times it was pretty simple to get used to. No sensitivity at all unlike many other products and can see a difference after applying for 7 days.

I have been using this whitening pen daily for a week now and I have been really impressed with the results. As a smoker, I was not expecting to see much of a difference but I have definitely seen my teeth look much cleaner which was exactly what I was looking for without having to go visit the dentist. Really happy with this whitening pen from smile science, definitely a great value buy which I would recommend to anyone looking for cleaner teeth!

Quite simply, this does not work. Either that or it was empty when delivered. It does not emit any gel. I thought it did, at the beginning, because there was gel in the lid (presumably leaked) and so it looked like it was working for a few days.It wasn’t until I bought a WORKING pen from another supplier, that I realised that this one was a dud. However, I am likely too late to return.

It does improve the colour of your teeth but i didn't think it was value for money for one but I bought from the same company and got 3 of them for less than a tenner and it's really has improved the colour of my teeth would recommend buy multi pack