cereal β β glucan is used as a film or coating agent to produce clear , edible , biodegradable , delivery , lubricating , and protecting agents . cereal β β glucans are distinctive polymers of glucose differentiated from other polymers by not only their source but also their physicochemical properties . the β β forms a matrix to sequester other materials , such as pharmaceutical , medical and therapeutic agents , flavors , fragrances . the technology has applications to essential oils and non - aqueous materials that are rendered deliverable by the β β glucan . the β β glucan films described may be consumed whereby they dissolve in the mouth in a controlled manner and may be used for the delivery of pharmaceutical , medical or confectionery products .