Which of the following can be a result of chemical hair coloring?

Chemical hair coloring can lead to increased hair brittleness due to the altering processes that the hair goes through during coloring. When hair is subjected to chemical treatments like dyeing, it can disrupt the natural structure of the hair. The chemicals often used in hair dyes, such as ammonia and peroxide, can penetrate the hair shaft and break down natural oils and proteins that help maintain the hair's strength and moisture balance. As a result, the hair becomes more fragile and susceptible to damage, leading to brittleness.

While there may be temporary improvements in appearance after coloring, such as shine or vibrancy, these are usually superficial and do not contribute to the long-term health of the hair. Therefore, maintaining healthy hair after chemical treatments often requires additional care, such as conditioning treatments and regular moisturizing routines, to counteract the drying effects of the chemicals.