the process is too much hassle. don't eat, don't drink, don't accidentally swallow it and the result is zero. I can't say that I saw any difference after 2 uses on different days

1.5 tones up, it works but you need to already have almost white teeth to notice it.. anyway, it works for me, this is the third time I use it

It definitely doesn't do what it says in the instructions, and I don't know if it's even good for the teeth... It didn't cause me any problems, but someone who has sensitivity in their teeth and gums might be harmed by it... It's better to go and get a cleaning done by your dentist and not spend 2-3€ on this

Guys, it's not worth it and it was for nothing. Let's not put things in our mouths that we don't know what they contain. My teeth and gums were hurting for 2 weeks as if I was getting shocked.

Indeed, it naturally whitens at least 1 - 1.5 tones. I will need a mouthpiece for application because it is impossible for it not to touch the inside of my mouth when I apply the gel. It is definitely worth the money and for its price, it is superb.

Personally, it didn't do anything for me.
No difference.
However, because it has a low price, it wasn't a big waste.
But I wouldn't recommend it to anyone.

It does exactly what it says, I don't know if it would work as well on very yellow teeth, but for a shade difference it does an incredible whitening job

With the proper use of the instructions it contains, the result is evident after 1 week! It is excellent and effective. I recommend it 100%.