What essential function do humectants serve in lotions?

Humectants play a crucial role in skin care products by acting as moisture-retaining agents. Their essential function is to attract water from the environment and bind it to the skin, preventing excessive water loss. This is particularly important for maintaining skin hydration and overall skin health, as hydrated skin appears plumper, firmer, and more youthful.

In contrast to other options, adding fragrance primarily serves to enhance sensory appeal rather than benefiting skin hydration. Providing UV protection involves using specific chemical or physical filters that shield the skin from harmful ultraviolet rays, which is not the primary role of humectants. Enhancing skin color is typically associated with pigments and dyes rather than moisture retention. This highlights the unique and critical function of humectants in keeping the skin hydrated and healthy, making them essential ingredients in skincare formulations.