Tonsil Epithelial Growth Supplement (TEpiCGS) is a medium supplement designed for the optimal growth of normal human keratinocytes in vitro. It is a sterile, concentrated (100X) solution which contains growth factors, hormones, and proteins necessary for the culture of normal human keratinocytes. The supplement is formulated (quantitatively and qualitatively) to provide a defined and optimally balanced growth environment that maximally promotes the growth of normal human keratinocytes in vitro. The supplement is designed as an additive for Tonsil Epithelial Cell Medium (TEpiCM, Cat. No. 2561) and should be used in conjunction with that medium. This product is for research use only. It is not approved for use in humans, animals, or in vitro diagnostic procedures.