meridol contains the long-acting combination of active ingredients amine fluoride/stannous fluoride. meridol toothpaste inactivates the residues of bacterial plaque left behind by brushing and has a lasting inhibitory action on the formation of new plaque, which continues long after brushing. In this way, meridol toothpaste promotes the natural regeneration of irritated gums. This unique combination of active ingredients also provides optimum caries protection. Clinical studies have proven that greater protection is provided against gingivitis if meridol toothpaste and meridol mouthrinse are used together.