Iowa Cosmetology Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

UV radiation has significant effects on the skin, primarily leading to premature aging and an increased risk of skin cancer. When skin is exposed to UV rays, it can cause damage to the DNA in skin cells, which may lead to mutations and disrupt normal cell function. Over time, this can result in visible signs of aging, such as wrinkles, fine lines, and loss of elasticity. Additionally, the cumulative effects of UV exposure contribute to the development of skin cancer, as the damage to DNA can lead to uncontrolled cell growth.

The other options suggest positive effects of UV radiation, but they do not accurately reflect the biological and dermatological implications of UV exposure. While some UV exposure can stimulate vitamin D production, which is vital for various bodily functions, the detrimental effects, particularly regarding skin health, far outweigh any beneficial outcomes. Thus, understanding the risks associated with UV radiation is crucial for skincare practices and overall health.