Serums are skin care products designed to deliver active ingredients to the skin in highly concentrated, lightweight formulas. Serums can be used at any age, with the most suitable for your skin type dependant on the key ingredient. For anti-aging serums look for formulas with Pro Retinol (such as Revitalift Classic Concentrated Serum) or Hyaluronic Acid (such as Revitalift 1.5% HA Serum). Serum often have small molecules so they can be quickly and effectively absorbed by the skin so are best applied immediately after cleansing. Apply your serum before your day or night cream to treat before you hydrate. Discover our ultimate guide to face serums here.