More sunlight, more vitamin D, less hypertension - Feb 2012

http://www.hindawi.com/journals/ije/2012/732636/
Clinical Study Associations of Sun Exposure with 25-Hydroxyvitamin D and Parathyroid Hormone Levels in a Cohort of Hypertensive Patients:
The Graz Endocrine Causes of Hypertension (GECOH) Study
International Journal of Endocrinology
Volume 2012 (2012), Article ID 732636, 8 pages
doi:10.1155/2012/732636

Stefan Pilz,1,2 Katharina Kienreich,1 Daniel Stückler,1 Andreas Meinitzer,3 and Andreas Tomaschitz11Division of Endocrinology and Metabolism, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria
2Department of Epidemiology and Biostatistics and EMGO Institute for Health and Care Research, VU University Medical Center, 1081 BT Amsterdam, The Netherlands
3Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, 8036 Graz, AustriaReceived 13 October 2011; Accepted 5 December 2011Academic Editor: Vin Tangpricha Copyright © 2012 Stefan Pilz et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

(Worst case of formatting on the internet I have ever seen. The x x x below are areas for which formatting was unrecoverable - see the PDF file at bottom of this page)

Sunlight-induced vitamin D, synthesis in the skin is the major source of vitamin D, but data on the relationship of sun-related behaviour with vitamin D and parathyroid hormone (PTH) levels are relatively sparse. We evaluated whether habitual sun exposure is associated with 25-hydroxyvitamin D (25[OH]D) and PTH levels and whether there exist seasonal variations.
We examined 111 hypertensive patients in Austria (latitude 47°?N).

• Frequent sunbathing at home and
• outdoor sports

were associated with higher 25(OH)D levels ( x x x for both).
Red or blond scalp hair as a child,
memory of sunburns,
preferring sunbathing,
frequent stays on the beach or in open-air pools, and
solarium use
were associated with lower PTH levels ( x x x x for all).
Multiple linear regression analyses including age, sex, and body mass index showed that sun exposure score was significantly associated with 25(OH)D (beta x x x x) by trend with PTH (beta x x x x)

These associations were more prominent in summer in which 25(OH)D levels were significantly higher compared to winter.
Translation of these findings into recommendations for the prevention and treatment of vitamin D deficiency remains a challenge for the future.

Table 2 Sunlight behavior and vitamin D - only those items with low P values are significant

Table 2 Sunlight behavior and vitamin D again ( poorly extracted, but somewhat usable for translation)

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Table 2: Associations of 25-hydroxyvitamin D with answers from a sun behaviour questionnaire.

Question number Question content Answer scores value 0 1 2 3 1 Personal sun relationship 28 ? 6 31 ? 15 37 ? 19 38 ? 23 0.06 2 Skin reaction to sun 28 ? 12 33 ? 16 35 ? 16 33 ? 20 0.25 3 Scalp hair as a child 33 ? 15 34 ? 17 0.79 4a Memory of sunburns 33 ? 17 34 ? 16 34 ? 18 0.68 4b Ever sunburns 18 ? 8 34 ? 17 0.07 5a Beach or open-air pools 31 ? 14 37 ? 19 0.05 5b Sunbathing at home 31 ? 14 38 ? 21 0.04 5c Gardening 35 ? 17 32 ? 16 0.37 5d Water sports or shipping 34 ? 17 31 ? 13 0.55 5e Other outdoor sports 30 ? 15 40 ? 18 0.003 5f Outdoor work 32 ? 16 36 ? 18 0.29 5g Holidays in sunny countries 29 ? 15 30 ? 16 34 ? 16 36 ? 17 0.07 5h Solarium 33 ? 17 34 ? 16 0.92 5i Light or UV therapy 33 ? 16 35 ? 24 0.87

25-hydroxyvitamin D data are shown in ng/mL as means ? standard deviation. values are derived from either Students t-test or from analysis of variance (ANOVA) with for trend.

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See also VitaminDWiki

• Less sun (less vitamin D), 1.4 X higher risk of hypertension – Feb 2021
• Modelling Vitamin D from the sun in Poland – 2011
• Perhaps not burn from the sun if have enough vitamin D even photosensitives?
• 8 Natural ways to prevent a sunburn – July 2011
• Overview Suntans melanoma and vitamin D
• Scared Out of the Sun for Fifty Years – Jan 2011
• Optimize vitamin D from the sun
• Hypertension and vitamin D