Sunlight has many beneficial influences on human health. It has a positive effect on wellbeing, boosts the circulation and releases so-called happy hormones. Sunlight stimulates the production of vitamin D, which plays an important part in various functions such as bone and tooth development and also the immune system. But the sun also poses a risk, especially for the skin, if you do not protect yourself. An overdose of light should therefore always be avoided. The correct way of managing the most important natural source of light is key to remaining in good health. This includes in particular also the question of what is the right degree of exposure and what is the right sun protection.