Hyaluronic Acid is a powerful humectant - attracts & retains moisture in the skin, making it essential for keeping skin hydrated. It works especially well for all skin types, including young; acne-prone skin, as it helps maintain moisture balance without clogging pores. The Bare Addiction Nightly Refresh Moisturiser contains Hyaluronic Acid to deeply hydrate the skin overnight, helping to repair and soothe while preventing dryness or irritation. This ingredient is perfect when combined with other acne-fighting treatments.