Janssen is a German cosmetics brand manufactured by Janssen Comsmetics. JANSSEN COSMETICS is a leading international manufacturer of professional beauty products. The well-structured range of retail products offers to consumers safe and efficient preparations for all specific needs of any type of skin or any skin problem. Stress-related skin cell damage speeds up the skin aging process. This is understandable. It is astonishing, however, that a lack of nutrition, which itself represents a form of stress, is able to slow down aging processes. Scientists have discovered that the human body activates the enzyme sirtuin to protect the cells during periods of low calorie intake. Sirtuins, also called longevity proteins, protect the genetic make-up by providing the cells with better resilience and increased vitality.