Cetylpyridinium chloride (CPC) is an ingredient shown to reduce plaque accumulation and gingivitis since it is antibacterial. In about 3% of people, it can result in staining and/or taste changes. It also reduces bad breath by killing bacteria.

Fluoride (0.02%) for enamel strengthening and cavity-fighting, it’s not the highest concentration available (0.05%) but your primary fluoride source is your toothpaste, anyway (10x more concentration).