Exposure to UV rays affects hair primarily by:

Exposure to UV rays primarily affects hair by causing color fading and dryness. UV radiation can damage the hair cuticle, which is the outer protective layer of each hair strand. This damage can lead to the deterioration of natural pigments within the hair, resulting in color loss, especially for colored hair. Additionally, UV rays can strip moisture from the hair, leading to dryness and brittleness. When hair becomes dry, it may lose its natural elasticity and appear dull rather than vibrant and shiny.

Understanding the impact of UV exposure is essential for maintaining hair health, particularly for individuals who spend significant time outdoors or use heat styling tools, as both factors can compound the effects of UV radiation on hair.