Face serum is a lightweight, topical skincare product that contains a higher concentration of active ingredients than other skincare products like moisturizers and cleansers. Serums are designed to address specific skin concerns such as wrinkles, fine lines, dullness, and dark spots. They are typically applied to the skin after cleansing but before moisturizing. Serums are easily absorbed by the skin and penetrate deeply to deliver active ingredients. They come in different formulations and prices, and the effectiveness of a serum depends on the active ingredients, formulation, vehicle, and stability of the compound. Some of the common active ingredients in serums include vitamin C, vitamin E, hyaluronic acid, ferulic acid, green tea, resveratrol, collagen peptides, epidermal growth factors, and stem cells.