Florida Cosmetology License Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

Using high heat on hair can lead to a weakened hair structure. When hair is exposed to excessive heat, it can cause the cuticle, which is the outer protective layer of the hair strand, to become damaged. This damage can manifest as split ends, brittleness, and overall loss of strength. Over time, the hair may become more prone to breakage and can lose its natural luster.

In contrast, options such as enhanced elasticity and increased shine are generally associated with healthy hair and proper hair care practices, rather than with the detrimental effects of high heat. While it's true that high heat can lead to faster drying times, this benefit is overshadowed by the potential long-term damage it can inflict on the hair's structural integrity. Therefore, the most accurate consequence of using high heat regularly is the weakening of the hair structure, making it less resilient to styling and environmental factors.