NOW Pets Cardio Support is a flavored powder for dogs and cats formulated to support normal circulation and heart function, with L-carnitine, taurine, hawthorn extract, CoQ10, and dandelion root. Mix into food per the label's weight-based dosing. This is a daily support supplement, not a treatment for diagnosed heart conditions — ask our staff or your veterinarian if your pet has an existing heart issue before starting.