Healthy skin is a sign of a healthy lifestyle. The body’s ability to maintain healthy skin, hair and fingernails depends e.g. on an adequate supply of nutrients. Everyday exposure to various conditions like UV-rays of the sun and other environmental influences like smog, tobacco smoke, unbalanced diet and stress can cause the formation of so-called ‘free radicals’ in the skin. An excess of these reactive molecules can lead, e.g., to premature ageing.