Sunlight radiation is a fundamental component of our daily lives. Specifically, blue light as well as UV light appear to play a role in the development of oxidative stress, DNA damage, photoaging, and pigmentation through the chromophores in skin tissues. However, several skin problems like psoriasis, eczema, and atopic dermatitis can be avoided with short-duration exposures to low-energy blue light radiation or UV radiation. In addition, exploring the effects of blue light as well as UV radiation on skin is quite essential for the development of minimally invasive antiaging strategies and for the design of innovative cosmetic formulations in modern aesthetics and cosmetology. Thus, in this review, we present the advantages as well as the disadvantages of light radiation, with a special focus on blue light and UV radiation activity on the human skin. We also discuss the molecular action of blue light and UV radiation on human skin. Other types of light radiation are included to holistically approach the effect of light on human skin.

Blue light, with wavelengths from 400 nm to 500 nm, is an important part of the sun's electromagnetic radiation spec- trum, which is present in human daily life, especially in the modern era due to the increased use of electronic devices through their screens. Low-energy and low time of expo-sure to blue light can enhance the prevention of certain skin conditions such as psoriasis, eczema, and atopic dermatitis, while studies have demonstrated that prolonged expo- sure to high-energy blue light can increase the amount of skin damage. DNA, cell death, skin barrier and fibroblast damage, hyperpigmentation, and photoaging. Therefore, in the fields of aesthetics and cosmetology, it is important to study the problems caused by exposure to the blue radiation spectrum. Improved protection filters, extracts of plant products, a variety of antioxidants, and natural ingredients from plants and algae are added to cosmetic products and compose innovative formulations as part of a comprehensive photoprotection strategy. In recent decades, antiaging strategies have been developed that include minimally invasive treatments with remarkable safety and efficacy and reduced recovery time. A combined approach of these treatments can provide optimal results in repairing the skin damage caused by ultraviolet (UV) and visible radiation and, consequently, in the overall improvement of the appear- ance of photoaged skin.