[Anua] Birch Moisture Boosting Serum 30ml[Anua] Birch Moisture Boosting Serum 30ml This hydrating serum is formulated with 70% Japanese White Birch Water that helps maintain the pH balance of the skin and prevents the skin from moisture loss. Helps soothe sensitive skin and maintain the oil moisture balance of the skin. Panthenol and 10 types of Hyaluronic Acids hydrate the skin and strengthen the skin barrier. How to Use Apply 2 3 drops to the entire face and gently tap for absorption.