There are three main areas of research at the CCP, all of which are carried out with the aid of innovative methods. These include predominantly non-invasive spectroscopic and imaging methods, which can be applied to skin cells, skin models and predominantly also in vivo on humans. They are used to study the interaction of the skin with influencing factors such as. Sunlight, environmental pollution, but also nutrition and therapeutic applications for skin diseases. Furthermore, they are used for the characterization of healthy skin but also for the diagnosis of skin diseases and therapy monitoring. Here, machine learning supports the data analysis. The skin has a strong barrier against external influences. The study and overcoming of this barrier for the introduction of active substances represents the third focus. Aids such as nanocarriers can protect and selectively release the active ingredients, improve penetration and serve as reservoirs.