What is the stratum corneum?

The stratum corneum is referred to as the outer layer of the epidermis and plays a crucial role in skin health and protection. It consists of dead skin cells that have undergone a process known as keratinization, where cells fill with keratin, making the skin tough and water-resistant. This layer acts as a barrier against environmental hazards such as pathogens, chemicals, and physical abrasions. Additionally, it helps prevent transepidermal water loss, maintaining hydration and overall skin health. By understanding the structure and function of the stratum corneum, one can appreciate its importance in skin care and cosmetology treatments.