Introducing Crest Enamel Repair & Gum Advanced Whitening toothpaste. Created after years of research by Crest scientists, it’s been specially formulated for healthier gums and helps repair weakened enamel. Crest Enamel Repair & Gum Advanced Whitening uses the active ingredient, Stannous Fluoride, to help remineralize weakened enamel and help eliminate plaque bacteria near the gum line. Clinically proven to reduce gum bleeding to fortify gums. The cooling, foaming formula in this toothpaste is able to get to hard to reach places, like around the gum line, leaving your teeth clean and strong and your gums feeling refreshed. Helps Reverse Early Gum Damage in 2 Weeks and Strengthens Weakened Enamel* *helps reverse gingivitis.