Serum
Serum is a skincare product enriched with active ingredients, such as Retinol, Hyaluronic Acid, Glycolic Acid, peptide, and Vitamin C. Serum also has more content because it is formulated to treat certain skin problems, such as dull skin, acne, black spots, or skin. dry. In the order of using skincare, serum is used after using toner.