Which of the following ingredients is known for attracting water to the skin?

Hyaluronic acid is renowned for its ability to attract and retain moisture in the skin. This ingredient is a naturally occurring polysaccharide found in the connective tissue of the body and is highly effective in hydrating the skin due to its capacity to hold up to 1,000 times its weight in water. When applied topically, hyaluronic acid not only increases moisture levels in the skin but also helps maintain skin elasticity and plumpness, making it a popular choice in skincare formulations intended for hydration and anti-aging.

Other ingredients listed have their unique properties, but they do not have the same water-attracting characteristics as hyaluronic acid. Collagen, for instance, serves primarily as a structural protein that provides firmness and elasticity to the skin, but it does not function to attract water. Similarly, elastin contributes to the skin's resilience and elasticity but lacks hydrating capabilities. Glycerin is a humectant that attracts moisture, but hyaluronic acid is more potent in this regard, making it a favored choice among estheticians for achieving maximum hydration.