What are humectants primarily used for in skin care products?

Humectants play a crucial role in skin care products primarily by temporarily attracting and holding moisture. These substances have the unique ability to draw water from the environment and bind it to the skin, which is essential for maintaining hydration. When applied, humectants can help keep the skin plump and moist, improving its overall appearance and preventing dryness.

In the context of skin care formulations, this hydrating property is especially important in products aimed at treating dehydrated skin or aging skin, where moisture retention can significantly impact skin health. By ensuring that the skin stays hydrated, humectants contribute to a smoother texture and a more youthful look.

The other options, while relevant to other aspects of skin care, do not align with the primary role of humectants. For instance, controlling oil pertains to other ingredients designed for oily skin, enhancing fragrance relates to scenting agents that may be added to products, and providing exfoliation involves ingredients that slough off dead skin cells, which is distinctly different from the moisture-related function of humectants.