Not sure about these.
I was excited to try these after using crest strips last year and having great results. I feel like the price was great and reviews pretty good. These worked to whiten teeth but my gums seems to be irritated and seemed to shrink up and look funny after use. I stopped using immediately and won’t use again. Definitely worth paying extra for brand ones to be safe. Could just be my gums reaction. Not sure.
Rating: 3 stars