Skin aging is one of the most studied aspects of aging because it is visible and can affect a person's appearance, which can have significant social and psychological effects. Aging of the skin can lead to changes in skin texture, color, and elasticity, which can affect how a person looks and feels about themselves. Furthermore, the skin plays an important role in protecting the body from environmental factors such as UV radiation and pollution. It also prevents excessive water loss and the entry of toxic substances and pathogens from the environment. Upon aging, the skin's ability to perform these functions can decrease, which can have negative effects on overall health.