This multi-functional* serum moisturizes and addresses age-related skin concerns. Formulated with BioShield Technology (a skin conditioning and moisturizing complex) developed to condition skin and maintain its health and suppleness, it helps to condition aging skin, supporting its barrier function and leaving it looking less sensitive. *Moisturizing, conditioning, protection, etc. [What is BioShield Technology?] Dermalogica developed BioShield Technology, a formula designed to address the natural functions of skin, focusing on the changes in the skin's environment as we age. This technology is made up of the following skin-conditioning and moisturizing ingredients, which help to keep skin healthy and support its barrier function: Carnosine (skin-conditioning ingredient): Keeps skin healthy and supports firmness and radiance Broccoli extract (skin-conditioning ingredient): Provides skin protection to keep the skin in a healthy state Ginger root extract (skin-conditioning ingredient): Tightens and conditions the skin Squalane (moisturizing ingredient): Moisturizes the skin, supporting softness and the formation of a protective film The combined effects of these ingredients address age-related dryness and imbalances from the skin's foundation. In addition, the following plant-derived ingredients complement Bio Shield Technology to provide multifaceted skin support: Carob Fruit Extract (skin conditioning ingredient): Promotes firmer, more elastic skin. Common Thistle Flower/Leaf/Stem Extract (skin conditioning ingredient): Supports barrier function and prevents rough skin. Mandarin Orange Extract (skin conditioning ingredient): Refines skin texture and moisturizes for a more translucent appearance (an upcycled ingredient made from waste food processing). Hydrolyzed Red Algae Extract (moisturizing ingredient): Moisturizes for plump, soft-looking skin. Recommended usage period: Approximately one month (when used according to instructions).