Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fluoride Free=Big Problems

I used this toothpaste for over a year, twice a day. I also used regular toothpaste once a day. This toothpaste does not contain any fluoride, which is great if you love going to the dentist and getting fillings and not so good if you really dislike having cavities. Do not only use this to replace regular toothpaste...it is extremely unhealthy for your teeth and WILL cause cavities because fluoride is required for healthy teeth, and this paste does not contain any.The flavor is not very good and the aftertaste is terrible.I do not believe they make this anymore, which is wonderful-because all it did was cost me a lot of money and time to fill SEVEN cavities because of using this toothpaste for over a year.