Milady Cosmetology Practice Exam

Water-binding agents in moisturizers are also known as what?

1. Emollients

2. Humectants

3. Hydrators

4. Conditioners

The correct answer is: Humectants

Water-binding agents in moisturizers are indeed known as humectants. Humectants are substances that attract moisture from the environment and help retain it in the skin. They play a crucial role in hydration by drawing water into the outer layer of the skin, leading to a plump and well-moisturized appearance. The effectiveness of humectants is vital, especially in skincare formulations, as they enhance the overall efficacy of the moisturizer by ensuring that the skin remains hydrated. Other types of agents, such as emollients, are more focused on providing a barrier to lock in moisture and smooth the skin, but they do not actively draw water into the skin like humectants do. Similarly, hydrators generally refer to products designed to add moisture, often incorporating humectants within their formulations, but the term itself is broader and not specifically associated with the action of binding water. Conditioners are also a separate category, often related to improving the feel and manageability of hair rather than skin hydration. Thus, humectants are distinct in their role as water-binding agents in moisturizers.