Introduction: Overexposure to ultraviolet rays damages skin cells and increases the risk of skin cancer. However, sunlight is essential for the synthesis of vitamin D, which is essential for our health. For this reason, a balanced approach between safe sun exposure and protection against the harmful effects of ultraviolet radiation is important. Purpose: The aim of diploma is to investigate, through a literature review, the amount of vitamin D needed to reduce the risk of skin cancer, taking into account adequate sun exposure. Methods: The descriptive method was used to write the diploma, reviewing professional and scientific literature, in the time from 2014 to 2024. The search was conducted in the following bibliographic collections: Medline (PubMed), CINAHL Ultimate, Trip medical database and through the Google Scholar search engine. We searched for literature is in English and Slovenian. Results: With the obtained results and a review of literature, we determined the optimal time of exposure to sunlight that is safe for an individual to obtain vitamin D. We presented the factors that affect the required time to the sun as such; skin pigmentation, amount of skin exposed, geographical location, season and use of sunscreen. Discussion and conclusion: The appropriate time of daily exposure for the synthesis of vitamin D is about 10-15 minutes, as it is also conditioned by other factors. Regarding exposure to sunlight, it is important to emphasize the concept of "little and often". Such behavior enables safe and sufficient synthesis of vitamin D in most individuals, while at the same time reducing the risk of skin damage. Special attention in education and preventive activities should be given to young peopleand people from lower socio-economic backgrounds, as they may be more susceptible to inappropriate exposure to the sun. It is important that, as healthcare professionals, we encourage the use of modern applications and devices that can be proven to change our behavior and at the same time prevent unwanted consequences.
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