Hi Dr Mike, thanks for the info on fluoride. I've recently been prescribed a 5000ppm fluroride toothpaste as opposed to 1450ppm which seems to be standard. However, I'm not sure on how often it should be used per day.

My dentist said I could use it as often as I like (?), elsewhere I've read you should use it once a day, last thing at night. At the moment I'm brushing 4 times a day, 3 times with normal 1450ppm toothpaste and once last thing at night with Duraphat 5000.

Is this enough, or should I use the 5000ppm toothpaste more often?

thanks for any advice.

John