Oklahoma Cosmetology Board Practice Exam 2026 - Free Cosmetology Practice Questions and Study Guide

Excessive heat styling can lead to significant damage and dryness of the hair shaft. When hair is frequently exposed to high temperatures from tools such as hair straighteners, curling irons, or hair dryers, the moisture content within the hair can evaporate. This loss of moisture undermines the structural integrity of the hair, leading to brittleness, split ends, and an overall dull appearance. The hair can become porous, increasing the risk of further damage from environmental factors and styling products.

While other options might suggest potential benefits or changes to the hair, they do not accurately reflect the consequences of overusing heat styling tools. Instead, the reality is that extreme heat puts stress on the hair, impacting its health negatively rather than enhancing its natural qualities or appearance. Therefore, acknowledging the impact of heat on hair health is crucial for anyone engaging in regular styling practices.