Massachusetts Board of Cosmetology Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the primary ingredient in most moisturizers that helps to hydrate the skin?

Alcohol

Water

Water is the primary ingredient in most moisturizers because it serves as a fundamental component that hydrates the skin. The presence of water in moisturizers helps to attract moisture to the skin and maintain its hydration levels, creating a barrier that prevents moisture loss.

While glycerin, oils, and even alcohol may have roles in some formulations, they do not serve as the primary hydrating agent. Glycerin is a humectant that draws moisture into the skin, oils can provide emollient properties and help seal in hydration, and alcohol can actually have a drying effect if present in high concentrations. However, the effectiveness and hydrating capacity of a moisturizer heavily rely on water as the base ingredient, making it essential for overall skin hydration.

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Oils

Glycerin

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