What is the function of vernix caseosa in newborns?

• A. It cleanses the skin
• B. It moisturizes the skin
• C. It protects the skin
• D. It causes skin irritation

Answer: (C)

Vernix caseosa serves as a protective coating for a newborn’s skin. It forms a barrier that shields delicate fetal skin from the constant exposure to amniotic fluid and from friction during passage through the birth canal, helping prevent maceration and injury. Its lipid-rich composition, along with antimicrobial components, also helps limit water loss and reduce infection risk, supporting skin integrity after birth. So, the primary role is protecting the skin, even though it may also contribute to moisture retention; it is not a cleanser, it does not cause irritation, and its main purpose isn’t to moisturize alone.