What is a common effect of over-processing hair?

Over-processing hair typically involves subjecting it to excessive chemical treatments, such as coloring, perming, or straightening, which can compromise its structural integrity. The common effect of this over-processing is damage and breakage.

When hair is over-processed, the protective outer layer, known as the cuticle, can become weakened and stripped away. This reduces the hair's ability to retain moisture, leading to dryness, brittleness, and ultimately, breakage. The internal structure of the hair can also be altered, resulting in a loss of strength and resilience. Therefore, recognizing that over-processing leads to damage and breakage is essential for maintaining healthy hair and understanding the importance of proper hair care practices.

The other options, such as improved shine, enhanced volume, and increased elasticity, suggest positive attributes that are typically not associated with the effects of over-processing. In fact, rather than shining, over-processed hair tends to appear dull and lifeless due to damage.