Advance to Healthier Gums and Stronger Teeth from Day 1 with Crest Pro-Health Advanced. This toothpaste contains ActivClean Crystals for advanced stain prevention. Like all Crest Pro-Health toothpastes, Crest Pro-Health Advanced Active Strengthening Toothpaste strengthens teeth enamel on the inside and protects outside of teeth against acids in everyday foods. vs. ordinary toothpaste with continued use. Starts fighting plaque and protecting enamel from Day 1. Acid erosion effects: Acids in everyday foods can soften and thin enamel, leaving teeth less white, weaker, and sensitivity. Deep cleaning formula Healthier gums by helping prevent gingivitis Stronger teeth by strengthening enamel on the inside Protects outside of teeth against acids in everyday foods Acid erosion effects: Acids in everyday foods can soften and thin enamel, leaving teeth less white, weaker, and sensitivity. Contains ActivClean Crystals for advanced stain prevention.