The sun is a source of energy that reaches our planet through different wavelengths (λ) of electromagnetic radiation. Human beings perceive exposure to radiation in the form of visible light (HEV) or heat, such as infrared radiation (IR). However, UV radiation is invisible, making sun exposure an imperceptible risk.
Exposure to solar radiation has multiple health benefits: among others, it stimulates the synthesis of vitamin D and it affects our mood. But just as it has positive effects, it can cause undesirable effects on the skin in the short and long term.
The skin has defence systems against solar radiation,, such as the production of melanin or the release of antioxidant substances. However, it does not have the capacity to filter all the effects of an occasional or accumulated overexposure on the organism.