What is a common effect of using too much heat when styling hair?

Using too much heat when styling hair can lead to damage and breakage. This occurs because excessive heat can weaken the protein structure of the hair, leading to dehydration and making the strands more prone to split ends and overall brittleness. Hair that is often subjected to high temperatures without appropriate protective measures will lose its natural moisture, resulting in a dry and unhealthy appearance.

In contrast, the other options suggest positive outcomes that are not typically associated with high heat usage. Increased shine can be achieved through proper techniques and products, while better hold is usually a result of the right styling products rather than excessive heat. Faster drying can occur with heat, but it can come at the cost of hair health, making damage a significant concern. Thus, recognizing the adverse effects of too much heat is essential for maintaining the integrity of hair.