What is the result of using too high a temperature on hair?

Using too high a temperature on hair often leads to damage and split ends. When hair is exposed to excessive heat, the cuticle—the outer protective layer of the hair—can become compromised. This results in the hair becoming weaker and more brittle, which is why split ends frequently occur. The high temperature can strip the hair of its natural moisture and oils, leading to a dry and frizzy appearance. Therefore, it is crucial to use heat styling tools at appropriate temperatures to maintain the health and integrity of the hair.

The other options suggest beneficial effects of high temperatures, which is not accurate. High temperatures do not lead to improved shine or smoothness; in fact, they can have the opposite effect by causing the hair to lose its smoothness and shine. Increased elasticity is typically a result of properly conditioned hair, not excessive heat. Similarly, using high temperatures would not reduce hair dryness; rather, it often exacerbates the issue by further drying out the hair.