How long do stratum corneum cells live?

Stratum corneum cells, which are the outermost layer of the skin, typically have a lifespan of about 2 to 4 weeks. They undergo a process called desquamation, where they are gradually shed and replaced by new cells from the underlying layers of the epidermis. This turnover is essential for maintaining skin health and barrier function. Factors such as age, skin condition, and environmental exposure can influence the lifespan and turnover rate of these cells.