Formulated with a gentle 20% complex of pure Vitamin C and skin-brightening botanical extracts. Designed for sensitive skin, it helps fade dark spots and boost radiance without irritation. How to use: After cleansing and toning, dispense 2 to 4 drops of Dr. Althea Vitamin C Serum using the dropper. Gently press and pat the serum into your skin. Allow 1–2 minutes for the serum to absorb, then follow with a daily moisturize. Finish your morning routine with broad-spectrum sunscreen.