What is the primary function of humectants in skincare?

Humectants play a crucial role in skincare by drawing moisture into the skin. These substances have the ability to attract water from the environment and from deeper layers of the skin, helping to keep the skin hydrated and plump. This moisture retention is especially important for maintaining the skin's elasticity and overall health, as hydrated skin tends to appear more vibrant and youthful.

In contrast, choices that involve UV protection, makeup removal, or skin tone enhancement serve different purposes in skincare. Protecting against UV rays is typically the function of sunscreens or sunblocks, while makeup removal is handled by cleansers or makeup removers. Enhancing skin tone often involves ingredients that address pigmentation or improve skin texture, rather than focusing on hydration. Therefore, the primary function of humectants is indeed to draw moisture into the skin, making this the correct answer.