Serum definition?

A serum is a skincare product that is typically lightweight and has a high concentration of active ingredients. Serums are designed to penetrate the skin deeply and deliver targeted benefits, such as hydration, brightening, or anti-aging effects. They are usually applied after cleansing and before moisturizing.

A serum is a type of cosmetic skincare product that is applied to the face and neck to improve the appearance of the skin. Serums are typically made with a high concentration of active ingredients, such as antioxidants, vitamins, and peptides, and are designed to penetrate deep into the skin to address specific skin concerns, such as wrinkles, fine lines, dark spots, and acne. Serums are typically applied after cleansing and toning the skin, and before applying moisturizer.