2 ms·I check the Fluor ppm and pick the most inexpensive one with the highest ppm personallyby realusername 10y agoI check the Fluor ppm and pick the most inexpensive one with the highest ppm personallynol13 10y agoWow your pineal gland must be bout closed shut.at612 10y agoHighest or lowest? I do the latter, obviously, for reasons of self-preservation (learnt this from a dentist).