New Jersey Cosmetology and Hairstyling Practice Exam

The ingredient that is commonly found in shampoo for oily hair is tea tree oil or charcoal. These ingredients are specifically known for their ability to absorb excess oil and reduce greasiness in the hair. Tea tree oil has antimicrobial properties, which can help combat dandruff and soothe the scalp, making it beneficial for those with oily hair. Charcoal is effective in drawing out impurities and absorbing oil, helping to clarify the hair and scalp, which is ideal for managing oiliness.

In contrast, the other options such as coconut oil, almond oil, and shea butter are typically more nourishing and moisturizing ingredients that can be beneficial for dry or damaged hair rather than oily hair. These ingredients are heavier and could potentially exacerbate oiliness rather than alleviate it. Therefore, tea tree oil and charcoal are more suitable choices for formulations aimed at oily hair.