A serum is a lightweight, concentrated skincare treatment designed to deliver powerful active ingredients deep into the skin. Formulated to target specific concerns such as dehydration, dullness, fine lines, dark spots, blemishes, and uneven skin tone, serums provide focused care while absorbing quickly without leaving a heavy or greasy feeling. Their high concentration of beneficial ingredients makes them an essential step in both simple and advanced Korean skincare routines.

In a Korean skincare routine, a serum is typically applied after cleansing, toning, and essence, and before moisturizer. Its lightweight texture allows active ingredients to penetrate the skin effectively, helping to address individual skincare concerns while enhancing the overall health and appearance of the complexion. With consistent use, a serum can help improve skin texture, boost hydration, increase radiance, and support a stronger, healthier skin barrier.

Korean serums are available in a wide variety of formulas to suit every skin type and concern. Hydrating serums often feature hyaluronic acid, panthenol, or ceramides, while soothing formulas are enriched with centella asiatica, heartleaf, or green tea to calm sensitive skin. Brightening serums commonly contain niacinamide, vitamin C, or rice extract, while anti-ageing formulas may include peptides, retinol, collagen, or fermented ingredients to help improve firmness, elasticity, and the appearance of fine lines.