NASC: National Animal Supplement Council - Quality seal. Fight bad breath at its source. Helps support a healthy oral microbiome. One chew a day. Helps fight bad breath and supports a healthy mouth! With a unique design that helps distribute our proprietary blend of active ingredients throughout your dog's mouth, one DentaLife ActivFresh chew a day fights bad breath at its source and supports good oral health. Unique design gives active ingredients time to work. Recommended to help manage bad breath.