UV radiation levels vary depending on location, time of year, time of day, cloud coverage and the environment.įor most people, adequate vitamin D levels are reached through regular incidental exposure to the sun. The best source of vitamin D is UVB radiation from the sun. How much sun do we need for healthy bones? We need vitamin D to maintain good health and to keep bones and muscles strong and healthy. Vitamin D forms in the skin when it is exposed to UV from sunlight. Sensible sun protection does not put people at risk of vitamin D deficiency. ![]() In Australia, we need to balance the risk of skin cancer from too much sun exposure with maintaining adequate vitamin D levels. The sun's ultraviolet (UV) radiation is both the major cause of skin cancer and the best source of vitamin D.
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