Study for the Colorado Cosmetology Written Exam with confidence using our comprehensive resources. Engage with a variety of questions covering critical topics in cosmetology and prepare effectively to secure your license!

Practice this question and more.


What is a common side effect of hair lightening?

  1. Brittle hair

  2. Hair growth

  3. Oily hair

  4. Thicker hair

The correct answer is: Brittle hair

Hair lightening is a chemical process that involves bleaching the hair to make it lighter. This process can damage the hair, making it dry and brittle. Hair growth and thicker hair are not common side effects of hair lightening. Oily hair may occur as a result of the scalp producing excess oils in response to the damage caused by the lightening process, but brittle hair is a more common side effect. Thus, the correct answer is brittle hair.