3 mins. 3 days. Once a month. +43% Boosting Effect** Boosted Regeneration* The exclusive Boosting Serum increases the effectiveness of the Advanced Toothpaste by 43%**, maximising the power of Enamel Mineral Regeneration*, even in interdental spaces that are hard to reach. Thanks to the NR-5 technology and the fluoride in its formulation, the Boosting Serum helps provide focused protection for your teeth against the effects of early enamel erosion and acid attacks. *Acts on early invisible stages of enamel erosion. Helps to regenerate enamel by restoring its mineral content and micro hardness with regular use. Clinically proven. **As demonstrated in a 3 day in vitro test measuring enamel micro hardness: combined used of Advanced Toothpaste and Boosting Serum vs Advanced Toothpaste only. Each Boosting Serum kit contains one NR-5 Serum and one Activator Gel plus two custom-fit mouth trays and a mixing stick.