Natural support for Periodontal Health in Dogs and Cats. It is a unique Dual Action product recommended for natural Gum and Joint Health in small dogs and cats. It directly supports the gums, making it a unique and effective solution. Many small dogs and cats take 1-TDC™ just like a treat, because it is very palatable. Some love to chew the soft gels, or you can cut open the soft gel and squeeze out the contents for your pet. Active Ingredients per capsule: Proprietary Blend of Esterified Fatty Acid Carbons (EFAC) (Bovine Source): 350 mg.