New Jersey Cosmetology and Hairstyling Practice Exam

What is the role of an acid-balanced shampoo?

1. To strip the hair of natural oils

2. To maintain the pH of the hair and scalp while cleansing

3. To add color to the hair

4. To increase the hair's volume

The correct answer is: To maintain the pH of the hair and scalp while cleansing

An acid-balanced shampoo plays a significant role in maintaining the pH of the hair and scalp while also effectively cleansing. The optimal pH range for hair and scalp health is typically around 4.5 to 5.5, which is slightly acidic. This acidity helps to close the cuticle layer of the hair, making it smoother, shinier, and less prone to damage. By using an acid-balanced formula, the hair retains its necessary moisture and natural oils, which can be stripped away by harsher, more alkaline shampoos. The focus of acid-balanced shampoos is to cleanse without disrupting the natural pH balance of the scalp and hair, promoting overall hair health. They are particularly beneficial for maintaining color-treated hair, as they help to prevent fading and damage. This is why the concept of pH balance is crucial in the discussion of hair care products, as it directly impacts the condition and appearance of the hair.