A serum is a skincare product with a high concentration of active ingredients, designed to penetrate deeper into the skin and target specific concerns like hydration, brightening, anti-aging, or pigmentation reduction. In the Korean beauty routine, the serum is applied after the essence and before the moisturizer. Use 1-2 drops and gently massage or pat it into the skin for better absorption.

The best serums for hydration contain ingredients like hyaluronic acid, panthenol, and glycerin, which help retain moisture in the skin. Additionally, serums with natural extracts such as aloe, oregano, or licorice root are popular in Korean skincare. Use a serum both morning and evening for maximum hydration.

Choose a serum based on your skin's needs. For dry skin, opt for hydrating ingredients like hyaluronic acid. For oily or acne-prone skin, serums with niacinamide or salicylic acid are ideal. For aging concerns, look for peptides, vitamin C, or retinol. In Korean skincare, personalization is key.