Using the tooth’s natural repair process, BioMin C mimics and enhances the natural way saliva replaces lost tooth's enamel minerals. Fluoride Free BioMin C was designed for consumers wanting a high-performance fluoride free toothpaste, and for those regions where ground waters contain high rates of naturally occurring fluoride. Fast Acting Within minutes of washing teeth, BioMin C increases the concentrations of calcium and phosphate in saliva to help drive the remineralisation process. Everyday toothpaste. BioMin C is designed to be used as an everyday toothpaste. What is the difference between BioMin F & BioMin C? BioMin F and BioMin C active ingredients are from the same family of bio active materials. Both are designed to put back the lost apatite (tooth mineral) that is dissolved from tooth surfaces on a daily basis.