It is well understood that we need to protect our skin from the impact of high-energy solar radiation. We all know that UV-B and UV-A radiation can damage DNA and proteins, leading to accelerated skin ageing. More attention is being paid to the contribution visible light makes to skin ageing. The most deleterious fraction of visible light is so-called „high energy visible light“ (HEV) or blue light, flanking the UV spectrum. Although most blue light is contained in daylight, typical artificial emitters of blue light are lamps and the screens of laptops, tablets and smart phones. The irradiation of skin with blue light increases

the reactive oxygen species (ROS) load of the cells, resulting in oxidative stress with subsequent damage to the genome, proteome and metabolome. As a consequence, cells lose their
capability to cope with other all-day impacts that drive premature skin ageing, which is associated with symptoms like hyperpigmentation, wrinkle formation and loss of elasticity and firmness. Protection against the consequences of blue light irradiation of skin is therefore essential for a healthy, youthful complexion