Utah Cosmetology and Barbering Practice Exam 2026 - Free Cosmetology and Barbering Practice Questions and Study Guide

UV exposure can have a significant impact on hair, primarily leading to the fading of color and the weakening of the hair structure. When hair is exposed to ultraviolet rays from the sun, these rays can break down the melanin that gives hair its color, causing it to appear duller and less vibrant. This is particularly noticeable in colored or dyed hair.

In addition to color loss, UV exposure can also compromise the integrity of the hair shafts. The rays can damage the cuticle, which is the outer protective layer, leading to increased vulnerability to environmental stressors. Consequently, the hair may become more brittle and prone to breakage, resulting in a weakened overall structure.

In contrast, thickening of hair strands, increased elasticity, and enhanced shine are not effects associated with UV exposure. Instead, the exposure generally results in negative outcomes for the hair's appearance and health.