This will be a single visit study that will take approximately 2 hours. Up to 50 subjects (up to 25 healthy subjects, and up to 25 subjects with AD) from BUMC dermatology clinics will be enrolled in this study and randomized to receive the 7 cleansers on 7 test spots on their upper extremities. One spot will serve as a control and not receive any cleanser. Each spot will be cleansed with the corresponding cleanser for 15 seconds then rinsed off with tap water. Skin barrier will be measured at baseline, immediately after, 30, 60 and 90 minutes after rinse off.