What is a common consequence of over-processing hair?

Over-processing hair typically involves excessive use of chemical treatments such as coloring, perming, or straightening. These processes can damage the hair's structure, stripping it of moisture and weakening its natural bonds. As a result, the hair can become dull and brittle, leading to increased breakage. This condition often makes the hair look lifeless and unhealthy, which aligns with the answer indicating that dullness and brittleness are common consequences of over-processing.

Stronger hair strands, increased shine, and faster hair growth are not outcomes of over-processing; instead, they may be associated with proper care and healthy hair practices. When hair is over-processed, it is more prone to damage rather than exhibiting strength, shine, or improved growth rates. Therefore, understanding the impact of chemical treatments helps maintain healthy hair and avoid adverse effects like dullness and brittleness.