This serum contains two core ingredients: caffeine and sodium hyaluronate. Caffeine can promote blood circulation in the skin, improve puffiness, and tighten the skin. Sodium hyaluronate provides a strong moisturizing effect for the skin, making it hydrated and elastic. It effectively reduces facial puffiness and improves skin firmness. It is light and easily absorbed by the skin. Suitable for all skin types, long-term use can make the skin firmer and smoother.