Which statement best describes the benefits of hyaluronic acid?

The statement that best describes the benefits of hyaluronic acid is that it retains moisture and adds plumpness. Hyaluronic acid is a naturally occurring substance in the body, primarily found in connective tissues, skin, and cartilage. Its most significant property is its ability to attract and hold onto water molecules, with the capacity to hold up to 1,000 times its weight in water. This makes it an excellent humectant, which means it can help hydrate the skin and maintain moisture levels.

By retaining moisture, hyaluronic acid contributes to a more youthful appearance, giving the skin a plump and healthy look. This function is especially beneficial in skincare formulations aimed at combating dryness and dehydration, resulting in smoother and more resilient skin.

In contrast, the other statements suggest benefits that are not associated with hyaluronic acid. Exfoliation is typically achieved through different ingredients such as alpha hydroxy acids or beta hydroxy acids. Increasing pigmentation is not a property of hyaluronic acid, as it does not influence melanin production. Similarly, while there are substances that help reduce redness, hyaluronic acid is not known for this particular function; its primary role lies in hydration and moisture retention.