The Society of Cosmetic Scientists 1999 Spring Symposium. Cosmeceuticals - one small step or a giant leap? Proving

A C Dweck1

  • 1Dweck Data, 8 Merrifield Road, Ford, Salisbury, Wiltshire SP4 6DF, U.K.

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The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular cells,...