“The old vitamin D spectrum will work if we subtract 5 from each wavelength, so the whole spectrum is shifted 5 nm to the left,” Professor Antony Young of Experimental Photobiology at KCL, and lead author of the study, told Medical News Today. However, adjusting vitamin D calculations could fix this. ![]() They found that the current guidelines did not predict vitamin D production from UVR exposure accurately. They compared levels of serum 25-hydroxyvitamin D3 - the gold standard for assessing vitamin D - in healthy volunteers following UVR exposure with suggested levels from current guidelines. In a recent study, researchers from King’s College London (KCL) in the United Kingdom conducted a study to test the current vitamin D guidelines. Getting sunlight guidelines up-to-date is important to ensure people get enough vitamin D while not putting themselves at risk of sunburn and skin cancer. However, some researchers suspect these guidelines may need revising, as pre-vitamin D undergoes chemical changes before becoming vitamin D that our bodies can use. UVA and UVB both cause tanning, skin aging, and the development of skin cancer, but only UVB leads to vitamin D production.Ĭurrent guidelines on sunlight exposure for vitamin D derive from 1982 research examining pre-vitamin D formation in the skin following UVR exposure. Sunlight contains two types of UVR: ultraviolet A (UVA), which makes up around 95% of the sun’s rays, and ultraviolet B (UVB), which comprises around 5% of the sun’s rays. ![]() However, UVR from sunlight can also cause sunburn and skin cancer. Ultraviolet radiation (UVR) from sunlight is a major source of vitamin D, accounting for around 80% of a person’s recommended daily allowance (RDA). It improves bone health and reduces the risk of chronic diseases, including: Vitamin D is a fat-soluble vitamin that plays a vital role in human health.
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