Iowa Cosmetology Practice Exam

Which product is best for managing moisture in hair to prevent split ends?

1. Dry shampoo

2. Hair serum or oil

3. Hairspray

4. Moisturizing gel

The correct answer is: Hair serum or oil

Using a hair serum or oil is optimal for managing moisture in hair to prevent split ends because these products are specifically formulated to add hydration and lock in moisture. Hair serums and oils typically contain nourishing ingredients like silicones, natural oils, and vitamins, which help to smooth the hair cuticle, reduce frizz, and provide a protective barrier against environmental factors. This leads to healthier hair that is less prone to damage and split ends. In contrast, dry shampoo is designed to absorb excess oil from the scalp and hair, offering grease control rather than moisture retention, which could actually exacerbate dryness if used excessively. Hairspray serves to hold hairstyles in place, but it can also contain alcohol or other drying agents that may strip moisture from the hair, contributing to brittleness over time. Moisturizing gel can provide some hydration, but it is often more focused on styling hold and may not penetrate the hair as effectively as an oil or serum designed for moisture retention.