Ceramides are fat (lipid) molecules that make up much of the skin's outer barrier, acting like the "mortar" between skin cells. They help the skin retain water and keep out irritants. Levels tend to decline with age and after menopause, contributing to dryness and sensitivity.
Moisturizers containing ceramides help reinforce a dry or compromised skin barrier and work well alongside humectants such as hyaluronic acid. They're gentle and suit most skin types, including sensitive skin. See menopause and skin.