People waste their time and money with this garbage. I'm not saying its bad, but there's much better stuff out there. If you care about re-enamelization which everyone with bad to average teeth should, get some Prevident Rinse. Its prescription, its made by Colgate and it has a generic version also. There is also a prevident toothpaste.
Use the mouthwash once a week and you're good. If your dentist doesn't tell you about it and you don't have great teeth, its ONLY because they want to make more money off of you.
If you drink water which contains fluoride - you will destroy the pineal gland. Guaranteed. Same with a paste. One more thing - any paste by definition is an abrasive substance. So it will slowly remove the enamel - not build it.
Use the mouthwash once a week and you're good. If your dentist doesn't tell you about it and you don't have great teeth, its ONLY because they want to make more money off of you.