The main functions of adult toothpaste include: 1. Anti caries: adult toothpaste contains fluoride, which can strengthen the acid resistance of teeth and reduce the incidence of caries. 2. Antibacterial: The adult toothpaste contains antibacterial ingredients, which can effectively inhibit the growth of bacteria in the mouth and reduce the occurrence of oral inflammation. 3. Tooth stain removal: Adult toothpaste contains stain removal components, which can remove stains on the surface of teeth and make teeth whiter. 4. Prevention of gingival bleeding: adult toothpaste contains anti-inflammatory ingredients, which can reduce the occurrence of gingival bleeding and maintain oral health. 5. Removing bad breath: adult toothpaste contains fresh ingredients, which can remove the bad breath and keep the breath fresh. In a word, the efficacy of adult toothpaste is mainly to protect oral health and prevent oral diseases.