Obagi Nu-Derm Foaming Gel [7005]  Obagi Nu-Derm Foaming Gel  - For Normal/Oily Skin Soap-free cleanser that gently removes impurities, oil and makeup to leave skin clean, fresh and ready for the next step. 6.7 fl oz (200 ml) The Obagi Nu-Derm System For Skin As you age and your skin incurs the abuse of daily living (such as sun, stress, pollution), the cell turnover rate slows down. This means that the new cells take longer to form and reach the top. The old cells accumulate and stay on the surface longer. You begin to notice those unwelcome signs of aging, including fine lines and wrinkles, freckles and age spots, uneven skin tone, loss of elasticity and loss of natural skin hydration.