Eggshell membrane
Eggshell membrane or shell membrane is the clear film lining eggshells, visible when one peels a boiled egg. Chicken eggshell membranes are used as a dietary supplement.Composition
Eggshell membrane is primarily composed of fibrous proteins such as collagen type I. Eggshell membranes also contain glycosaminoglycans, such as dermatan sulfate, chondroitin sulfate, and sulfated glycoproteins including hexosamines, such as glucosamine. Other components identified in eggshell membranes are hyaluronic acid, sialic acid, desmosine, isodesmosine, ovotransferrin, lysyl oxidase, lysozyme, and β-N-acetylglucosaminidase.
