Boost the effectiveness of your regenerate advanced toothpaste and protect your teeth against the effects of early enamel erosion and acid attacks with the regenerate enamel sciencetm boosting serum the boosting serum will increase the effectiveness of the advanced toothpaste by 43 maximising the power of enamel mineral regeneration the serums combination of nr 5tm technology and fluoride will help to rebuild lost enamel in even hard to reach places each kit contains one nr 5tm