When learning about how often some cells replenish themselves, peter was encouraged to know that the skin cells on his face are essentially replaced every days?

10 - 30 days. The old epidermal skins cells, those of stratum corneum, slough off and are replaced newer cells from underneath. This replenishing of epidermal cells is quicker I'm regions of thinner epidermis as compared to thick regions as palms of the hand. In every hour, approximately 30,000 - 40,000 skin cells fall off our skins