Dermalogica products are designed to be most effective when prescribed by a Dermalogica professional skin therapist extensively trained in Face MappingÂ® skin analysis. Face Mapping analysis is the process of analyzing your skin, zone-by-zone, to diagnose your skin condition and prescribe suitable products for results. Without the assistance of a Dermalogica professional skin therapist, you may select the wrong products for your skin, and fail to reach your desired skin health results. Some people see results the first time they use the products, and everyone tells us that their skin feels different straight away. The skin feels, clean, smooth, hydrated, and reflects a new level of health that is visibly noticeable. If the skin has more advanced long-term needs, such as treatment of skin ageing, acne or hyper-pigmentation caused by hormonal fluctuations or sun damage, results may not be immediately visible; however, skin health will continue to improve as you follow the advice of your professional skin therapist, your Face MappingÂ® zone-by-zone prescription and your home care regimen.