VETRI-LEAN for dogs contains the clinically tested starch blocker Phase 2 pet to support weight loss. We are one of the first companies to introduce a Phase 2 pet weight loss product for dogs. Phase 2 pet is the first clinically and scientifically proven all natural ingredient for neutralizing starch to induce weight loss. Phase 2 pet is shown to cut starch digestion up to 75%, so it safely and naturally reduces absorption of carbohydrate calories to support weight loss without the use of stimulants. Great for weight loss and dogs love the tasty chicken flavor!