What is the (negative) effect of solar exposure? Our skin is the part with a constant contact with the environment. For this reason, it is always subjected to touch and stimuli that can have both positive and negative affect. The effects of sunlight and artificial UV rays have been extensively studied in recent years and it has been shown that the sun exposure can result in serious damage to the skin. Specifically, UV rays affect the mitochondria, a part that is responsible for cellular respiration, located in the cells and the nucleus. It will result in the loss of skin elasticity and skin atrophy. But let's see what are the risks we would have by spending too much time in the sun without adequately protecting ourselves. Aging The main risk arising from a prolonged solar exposure is the aging process we have already mentioned. This is a change we can recognize by seeing, even with the naked eye, the difference between the exposed parts and the less exposed part. Moreover, the consequences may be more serious if we have spent too much time under sunlight throughout our life, and if we are "weak". Identified with having, blue, Green, gray eyes, and blond or red hair. Dermatologists identify six different photo types based on the individual characteristics and skin reaction to the solar exposure. The first ones, light or reddish, white skin are those considered "weak" and require higher protection. People with darker skin is more resistance to the sunlight exposure. There are also other factors that affect skin aging: first, age has a very important role to the condition in children and the elderly; Secondly, lifestyle and the type of work (the open-air professions) are more exposed than those who work in the office. Melanoma The most serious consequence of high sun exposure is skin cancer. According to a research, every year there are 3,150 new cases for men and 2,850 for women diagnosed with it, only in Italy. The most affected age range is between the ages of 45 and 50, but it is rapidly decreasing as well. Although melanoma represents only 5% of all skin cancers and early diagnosis allows complete healing in 95% of cases, it is scientifically confirmed that UV exposure and, in particular, UV-A and UV- B is one of the reasons for melanoma.