Which cells are responsible for producing keratin?

Keratinocytes are the primary cells responsible for producing keratin, a fibrous protein that forms the structural framework for the outer layer of the skin (the epidermis), as well as for hair and nails. These cells are involved in the process of keratinization, where they produce keratin and become hardened and flattened to form a protective barrier against environmental damage, dehydration, and pathogens.

This process is critical for maintaining the integrity and health of the skin, as keratin provides strength and resilience. In contrast, melanocytes are responsible for producing melanin, which gives skin its color and protects against UV radiation. Fibroblasts are primarily involved in the production of collagen and elastin, which are essential for skin structure and elasticity, while adipocytes are fat cells that store energy and help with insulation and cushioning. Understanding the specific functions of these different cell types helps clarify the role of keratinocytes as the key producers of keratin in the skin.