Ace the Iowa Cosmetology Exam 2025 – Style, Snip, and Shine!

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What effect can prolonged UV exposure have on hair?

It prevents color fading.

It can lead to dryness and brittleness.

Prolonged UV exposure can have several detrimental effects on hair, with the most significant being that it can lead to dryness and brittleness. UV rays penetrate the hair cuticle, damaging the structural integrity of the hair strand. This damage disrupts the balance of moisture, resulting in hair that appears dull, feels rough to the touch, and is more prone to breakage.

In contrast, color fading occurs as a result of UV exposure due to the breakdown of color molecules, rather than preventing it. Enhancing shine is not an effect of UV exposure; in fact, the opposite is true, as damaged hair often appears lackluster. Healthy growth is also not promoted by UV exposure; instead, the damage can hinder overall hair health, making continued growth more difficult. Therefore, the correct answer highlights the adverse impact of UV rays on the hair's health and appearance.

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It enhances the shine of hair.

It can promote healthy growth.

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