Milady Cosmetology Practice Exam 2025 – All-in-One Guide to Master Your Cosmetology Certification!

Moisturizers are specifically designed to increase the water content of the skin's surface. They achieve this by incorporating humectants—ingredients that attract moisture from the environment and draw it into the skin. This process not only hydrates but also helps create a protective barrier that prevents water loss, ensuring the skin remains supple and healthy.

Emollients, while they can provide hydration, primarily focus on softening and soothing the skin by filling in the gaps between skin cells. They create a barrier to lock in moisture but are not solely responsible for increasing the water content. Exfoliants are designed to remove dead skin cells and promote cell turnover rather than adding moisture. Serums may contain hydrating ingredients, but their formulation is often more concentrated and targeted for specific skin concerns rather than simply increasing water content. Thus, moisturizers are the most effective choice for enhancing hydration.