Which ingredient is often used for additional hydration in moisturizers?

Hyaluronic acid is commonly used in moisturizers for its exceptional hydrating properties. It is a naturally occurring substance in the body known for its ability to retain moisture, holding up to 1,000 times its weight in water. This makes it an excellent ingredient for providing additional hydration to the skin. When included in skincare formulations, hyaluronic acid can help improve skin texture, plumpness, and overall hydration levels, making it a favorite among those looking to achieve a well-hydrated complexion.

In contrast, salicylic acid is primarily known for its exfoliating and acne-fighting qualities rather than hydration, as it helps to remove dead skin cells and clear pores. Tea tree oil is an essential oil with antimicrobial properties, often used for its ability to treat acne but not specifically for hydration. Witch hazel is known for its astringent and soothing properties, making it beneficial for minimizing skin blemishes and irritation but not typically associated with hydration.