Natural Moisturizing Factors + HA for Scalp is a light milky serum from The Ordinary for the care of the scalp. The formula contains a combination of ingredients that mimic the function of natural moisturizing factors, as well as hyaluronic acid and squalane, which occur naturally in the skin. Application: Natural Moisturizing Factors + HA for Scalp is a light milky serum from The Ordinary for the care of the scalp.