What is a common result of over-processing hair during chemical treatments?

When hair undergoes over-processing during chemical treatments such as coloring, perming, or relaxing, it typically leads to significant damage and breakage. This occurs because the harsh chemicals in these treatments disrupt the natural structure of the hair, weakening the protein bonds that provide strength and elasticity. As a result, over-processed hair can become dry, brittle, and more prone to breaking, leading to an overall unhealthy appearance.

Maintaining a proper balance during chemical treatments is crucial to avoid these detrimental effects and ensure that hair retains its integrity and health. The other options, such as shinier appearance, color enhancement, and moisture retention, are generally positive outcomes associated with well-managed chemical treatments, not with the consequences of over-processing.