What does "over-processing" refer to in hair care?

"Over-processing" refers specifically to the damage that occurs when hair undergoes excessive chemical treatments, such as coloring, perming, or relaxing, beyond its capacity to recover. This situation often results in the hair becoming dry, brittle, and more prone to breakage. When the cuticle layer of the hair is repeatedly subjected to harsh chemicals, it can lift excessively, leading to the loss of moisture and the structural integrity of the hair.

Understanding this concept is crucial in hair care practices, as it emphasizes the importance of following recommended guidelines for chemical usage and taking into consideration the hair's health and condition before applying further treatments. In contrast, other options focus on issues that, while significant, do not directly relate to the chemical reactions involved in over-processing. Proper shampooing techniques, infrequent haircuts, and excessive use of heat styling tools can contribute to hair health problems, but they do not define the specific phenomenon of over-processing.