What is the result of over-processing hair during a chemical treatment?

Over-processing hair during a chemical treatment leads to the breakdown of the hair's protein structure, which results in weak and brittle strands. This happens because chemical treatments, such as coloring, perming, or relaxing, can strip away the natural oils and moisture from the hair. When these protective elements are compromised, the hair becomes more vulnerable to damage, making it prone to breakage and split ends. This condition can make the hair more difficult to style, as it loses its elasticity and strength.

In contrast, other outcomes such as frizzy and unmanageable hair, increased shine and softness, or color fading can occur under specific circumstances, but they do not directly relate to the fundamental effects of over-processing. For example, frizz can be a result of dryness or humidity, while color fading may occur due to improper care or washing techniques rather than over-processing. However, weak and brittle strands are the most direct consequence of excessive chemical exposure.