XB2H – Optimal Digestion Optimal Digestion is a broad spectrum vegetarian blend of digestive enzymes that supports healthy digestion. It supports digestion of carbohydrates, fats and proteins and includes DPP4 which assists with the digestion of Gluten and Casein. Herbal support with gentian root, a traditional bitter, and artichoke are included to support the body’s natural production of enzymes and bile.