Loading...
 
Toggle Health Problems and D

Get enough Vitamin D from UK winter sun (if white skin and believe that 10 ng is enough) - Aug 2018

Is Sunlight Exposure Enough to Avoid Wintertime Vitamin D Deficiency in United Kingdom Population Groups?

Int J Environ Res Public Health. 2018 Aug 1;15(8). pii: E1624. doi: 10.3390/ijerph15081624.
Kift R1, Rhodes LE2, Farrar MD3, Webb AR4.

Vitamin D Life

The UK government continues to mistakenly believe that 10 ng is enough
Most of the rest of the world believes than at least 30 ng is needed

Note a major mistake in the study.
They used UVR sensors which most liekly measure the total of UVA + UVB
Only UVB generates Vitamin D in the skin.
UVA greatly exceeds UVB after about 3PM, when a high UVR reading generates no Vitamin D.


 Download the PDF from Vitamin D Life
Image

Solar ultraviolet radiation (UVR) is required for cutaneous vitamin D synthesis, and experimental studies have indicated the levels of sun exposure required to avoid a vitamin D deficient status. Our objectives are to examine the sun exposure behaviours of different United Kingdom sectors and to identify if their exposure is enough to maintain winter circulating 25-hydroxyvitamin D above deficiency (>25 nmol/L). Data are from a series of human studies involving >500 volunteers and performed using the same protocols in Greater Manchester, UK (53.5° N) in healthy white Caucasian adolescents and working-age adults (skin type I⁻IV), healthy South Asian working-age adults (skin type V), and adults with photodermatoses (skin conditions caused or aggravated by cutaneous sun exposure). Long-term monitoring of the spectral ambient UVR of the Manchester metropolitan area facilitates data interpretation. The healthy white populations are exposed to 3% ambient UVR, contrasting with ~1% in South Asians. South Asians and those with photodermatoses wear clothing exposing smaller skin surface area, and South Asians have the lowest oral vitamin D intake of all groups. Sun exposure levels prevent winter vitamin D deficiency in 95% of healthy white adults and 83% of adolescents, while 32% of the photodermatoses group and >90% of the healthy South Asians were deficient. The latter require increased oral vitamin D, whilst their sun exposure provides a tangible contribution and might convey other health benefits.


Created by admin. Last Modification: Monday May 13, 2019 10:19:55 GMT-0000 by admin. (Version 7)

Attached files

ID Name Comment Uploaded Size Downloads
11320 Winter UK.jpg admin 02 Feb, 2019 22:13 25.03 Kb 393
11319 UK Winter 10 ng.pdf PDF 2018 admin 02 Feb, 2019 22:12 1.93 Mb 228
See any problem with this page? Report it (FINALLY WORKS)