Multi-Benefit Protection. Crest Multi-Care fights cavities; fights visible tartar build-up; leaves breath feeling refreshed; leaves long lasting clean feel; protects against acids that cause cavities - all in one toothpaste. Foaming action carries protection even to the tiny crevices and places in between teeth. ADA Accepted (American Dental Association): Crest MultiCare has been shown to be an effective decay-preventive dentifrice that can be of significant value when used as directed in a conscientiously applied program of oral hygiene and regular professional care. It has been shown to reduce the formation of tartar above the gumline, but has not been shown to have a therapeutic effect on periodontal diseases. - Council on Scientific Affairs, American Dental Association.