"PNAS" sun exposure/vitamin D guidelines may need to be revised

According to a new study published today (September 27, 2021) in the Proceedings of the National Academy of Sciences (PNAS), previously published guidelines for optimal vitamin D synthesis based on skin sample research may need to be revised

Researchers at King’s College London, with the support of the Gay and St.

Ultraviolet rays from the sun can cause sunburn and skin cancer.

Public health advice on sun exposure considers both risks and benefits

The link between specific UVB wavelengths and vitamin D production was established in skin samples (in vitro) more than 30 years ago

Researchers led by Professor Antony Young of King’s College London measured the blood vitamin D of 75 healthy young volunteers before, during and after partial or whole exposure to five different artificial UVR sources (with different amounts of UVB radiation) Level, to weigh the trade-offs between the benefits of sun exposure, which includes the synthesis of vitamin D, compared with the risks of sunburn and skin cancer

They then compared their results with those predicted by the old in vitro vitamin D study and found that the previous study did not accurately predict the benefits of UV exposure

The authors suggest that the wavelength dependence of vitamin D in vitro system for simple calibration

Professor Young said: "Our research shows that it may be necessary to re-evaluate the calculation of the risks and benefits of solar radiation