Review (5/5): Best investment
This product is absolutely amazing. It works so well I’ve only used it 3 times and it’s been 3 weeks since I last used it because my teeth are still white. There is absolutely no sensitivity and product last a long time. I know whitening pens are temporary but as I stated it has been 3 weeks and I have been using an antibiotic mouthwash which stains teeth yellow, even without retouching my teeth are still white. Buy this product you won’t regret it!