It is the grain that contains Gluten, not the young grass. Our Wheat Grass is harvested before the jointing stage. The jointing stage is that point at which the internodal tissue in the grass leaf begins to elongate, forming a stem. This stage represents the peak of the cereal plants vegetative development; factors involved in photosynthesis and plant metabolism would be expected to increase up to this stage. At this stage the grass has yet to sprout. Sprouting begins the process of grain creation. Since we use the young grass that is harvested before the Jointing Stage there is no grain and subsequently no gluten.