Natural with added vitamins & minerals. Gluten-free! Dogs love em. No preservatives. Highly digestible. Veterinarian recommended. With Vida Complex for health & wellness. Vida Complex contains: antioxidants; vitamins; minerals, including calcium; no added sugar; no added salt. Gluten-free formula. Nylabone USA is guarantor of analysis. Central garden & pet. Production powered in part by sustainable solar energy. Satisfaction guarantee. Join club Nylabone at www.nylabone.com! www.nylabone.com. USA made.