Nordics Kids toothpaste Strawberry Splash with Probiotic SymReboot OC. Fluoride free, with added Xylitol for everyday use. Suitable for children of all ages. Active ingredients are Xylitol, which has proven anti-cavity properties, and Calcium Lactate. This kids toothpaste contains the new SymReboot OC which is a processed probiotic that sustains the oral cavity’s instinctive defenses and supports the healthy balance of the oral microbiome. We have developed this toothpaste specially for children’s sensitive gums and teeth that need the best care possible.