Tartar build-up reduction by up to 40%. Purina research. Healthy urinary tract promoted by balanced minerals. High nutrient absorption thanks to high quality ingredients. Helps maintain strong and healthy bones thanks to minerals and vitamin D. Healthy skin and shiny coat supported by Omega 6 fatty acids and zinc. Purina ONE Adult is nutritionally tailored for cats aged 1-7 years. Purina ONE BIFENSIS is a unique nutritional formula with beneficial functional bacteria scientifically proven to help support your cat's natural defences from the inside out. Developed by Purina vets and nutritionists, Purina ONE Bifensis contains, along with the beneficial functional bacteria, all the key nutrients your cat needs, including Omega 6 fatty acids. Its dual defence formula works in parallel on the inside, by helping to support your cat's natural antibody production, and on the outside by maintaining healthy skin and coat.