Michigan Cosmetology Licensing Practice Exam 2026 - Free Cosmetology Practice Questions and Study Guide

Using strong hair bleach often leads to hair becoming brittle and over-processed due to the harsh chemicals involved in the bleaching process. Hair bleach works by penetrating the hair shaft to remove the natural pigment (melanin), which can disrupt the structural integrity of the hair. This disruption can lead to a loss of moisture and elasticity, making the hair dry and fragile. When hair is over-processed, it can become unable to withstand everyday styling and environmental factors, resulting in breakage and split ends.

In contrast, while some may think hair could become greasy or change color unpredictably, these are not typical direct consequences of using strong hair bleach. The process is more about stripping color rather than adding moisture or imbuing vibrancy. Furthermore, whereas some products can make hair more manageable, strong bleach does the opposite; it can leave the hair rough and difficult to style due to the damage caused. Thus, the pronounced brittleness and over-processing are the most common and significant side effects associated with strong hair bleach.