Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe.
Dermal synthesis, following sun exposure, is the main source of vitamin D. This study characterizes ambient UVB radiation relevant for vitamin D production in Europe. A biological weighing function was applied to data from the Tropospheric Emissions Monitoring Internet Service (TEMIS) for 46 capital...
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Molecular Diversity Preservation International MDPI
2022
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Online Access: | https://boris.unibe.ch/175736/1/nutrients-14-05189.pdf https://boris.unibe.ch/175736/ |
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ftunivbern:oai:boris.unibe.ch:175736 2023-08-20T04:07:31+02:00 Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe. Khanna, Tarinee Shraim, Rasha Zarkovic, Masa van Weele, Michiel van Geffen, Jos Zgaga, Lina 2022-12-06 application/pdf https://boris.unibe.ch/175736/1/nutrients-14-05189.pdf https://boris.unibe.ch/175736/ eng eng Molecular Diversity Preservation International MDPI https://boris.unibe.ch/175736/ info:eu-repo/semantics/openAccess Khanna, Tarinee; Shraim, Rasha; Zarkovic, Masa; van Weele, Michiel; van Geffen, Jos; Zgaga, Lina (2022). Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe. Nutrients, 14(23), p. 5189. Molecular Diversity Preservation International MDPI 10.3390/nu14235189 <http://dx.doi.org/10.3390/nu14235189> 610 Medicine & health 360 Social problems & social services info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2022 ftunivbern https://doi.org/10.3390/nu14235189 2023-07-31T22:17:48Z Dermal synthesis, following sun exposure, is the main source of vitamin D. This study characterizes ambient UVB radiation relevant for vitamin D production in Europe. A biological weighing function was applied to data from the Tropospheric Emissions Monitoring Internet Service (TEMIS) for 46 capital cities over an 18-year period (2004-2021) to isolate wavelengths relevant for vitamin D production (D-UVB). Cumulative and weighted D-UVB (CW-D-UVB) were calculated to approximate seasonal vitamin D accumulation and diminution. Monthly 25(OH)D concentration measurements were extracted from published reports. All data were analyzed by location and time. Despite a moderate latitudinal range (35-64° N), we observed large-up to five-fold-regional differences: the highest mean diurnal D-UVB dose of 5.57 kJ/m2 (SD = 3.55 kJ/m2) was observed in Nicosia (Cyprus) and the lowest in Reykjavik (Iceland, 1.16 ± 1.29 kJ/m2). Seasonal differences in diurnal D-UVB dose were even more pronounced, with a median 36-fold difference between annual peak and trough depending on a location (range: 10- to 525-fold). The mean duration of "vitamin D winter" was 126 days but varied widely (4 to 215 days). Monthly CW-D-UVB and 25(OH)D changes were very strongly correlated: the changes in 25(OH)D concentration increased by 12.6 nmol/L for every 100 kJ/m2 increment of CW-D-UVB in population-based studies (r2 = 0.79, p-value = 1.16 × 10-37). Understanding the differences in D-UVB radiation can help understand determinants of vitamin D status and guide region- and season-specific safe and effective sunlight exposure recommendations and vitamin D supplementation guidelines. Article in Journal/Newspaper Iceland BORIS (Bern Open Repository and Information System, University of Bern) Nutrients 14 23 5189 |
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Open Polar |
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BORIS (Bern Open Repository and Information System, University of Bern) |
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ftunivbern |
language |
English |
topic |
610 Medicine & health 360 Social problems & social services |
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610 Medicine & health 360 Social problems & social services Khanna, Tarinee Shraim, Rasha Zarkovic, Masa van Weele, Michiel van Geffen, Jos Zgaga, Lina Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe. |
topic_facet |
610 Medicine & health 360 Social problems & social services |
description |
Dermal synthesis, following sun exposure, is the main source of vitamin D. This study characterizes ambient UVB radiation relevant for vitamin D production in Europe. A biological weighing function was applied to data from the Tropospheric Emissions Monitoring Internet Service (TEMIS) for 46 capital cities over an 18-year period (2004-2021) to isolate wavelengths relevant for vitamin D production (D-UVB). Cumulative and weighted D-UVB (CW-D-UVB) were calculated to approximate seasonal vitamin D accumulation and diminution. Monthly 25(OH)D concentration measurements were extracted from published reports. All data were analyzed by location and time. Despite a moderate latitudinal range (35-64° N), we observed large-up to five-fold-regional differences: the highest mean diurnal D-UVB dose of 5.57 kJ/m2 (SD = 3.55 kJ/m2) was observed in Nicosia (Cyprus) and the lowest in Reykjavik (Iceland, 1.16 ± 1.29 kJ/m2). Seasonal differences in diurnal D-UVB dose were even more pronounced, with a median 36-fold difference between annual peak and trough depending on a location (range: 10- to 525-fold). The mean duration of "vitamin D winter" was 126 days but varied widely (4 to 215 days). Monthly CW-D-UVB and 25(OH)D changes were very strongly correlated: the changes in 25(OH)D concentration increased by 12.6 nmol/L for every 100 kJ/m2 increment of CW-D-UVB in population-based studies (r2 = 0.79, p-value = 1.16 × 10-37). Understanding the differences in D-UVB radiation can help understand determinants of vitamin D status and guide region- and season-specific safe and effective sunlight exposure recommendations and vitamin D supplementation guidelines. |
format |
Article in Journal/Newspaper |
author |
Khanna, Tarinee Shraim, Rasha Zarkovic, Masa van Weele, Michiel van Geffen, Jos Zgaga, Lina |
author_facet |
Khanna, Tarinee Shraim, Rasha Zarkovic, Masa van Weele, Michiel van Geffen, Jos Zgaga, Lina |
author_sort |
Khanna, Tarinee |
title |
Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe. |
title_short |
Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe. |
title_full |
Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe. |
title_fullStr |
Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe. |
title_full_unstemmed |
Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe. |
title_sort |
comprehensive analysis of seasonal and geographical variation in uvb radiation relevant for vitamin d production in europe. |
publisher |
Molecular Diversity Preservation International MDPI |
publishDate |
2022 |
url |
https://boris.unibe.ch/175736/1/nutrients-14-05189.pdf https://boris.unibe.ch/175736/ |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Khanna, Tarinee; Shraim, Rasha; Zarkovic, Masa; van Weele, Michiel; van Geffen, Jos; Zgaga, Lina (2022). Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe. Nutrients, 14(23), p. 5189. Molecular Diversity Preservation International MDPI 10.3390/nu14235189 <http://dx.doi.org/10.3390/nu14235189> |
op_relation |
https://boris.unibe.ch/175736/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/nu14235189 |
container_title |
Nutrients |
container_volume |
14 |
container_issue |
23 |
container_start_page |
5189 |
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1774719203774824448 |