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Journal of Endocrinological Investigation

, Volume 23, Issue 3, pp 173–177 | Cite as

Sunlight exposure and vitamin D deficiency in Turkish women

  • Faruk Alagöl
  • Y. Shihadeh
  • H. Boztepe
  • R. Tanakol
  • S. Yarman
  • H. Azizlerli
  • Ö. Sandalci
Original Article

Abstract

Vitamin D is an essential steroid involved in bone metabolism, cell growth, differentiation, and regulation of the minerals in the body. The main sources of this vital vitamin are adequate diet and photosynthesis in the skin. The aim of this study was to investigate the efficiency of vitamin D synthesis in 48 premenopausal women (14–44 years) in relation to three different types of dressing in summer. Women in the first group (Group I) dressed in a style which exposed the usual areas of the skin to sunlight; women in the second group (Group II wore traditional clothing with the skin of the hands and face uncovered, while the third group (Group III) dressed in traditional Islamic style, covering the whole body including hands and face. Serum 25OHD levels of Group I, Group II, and Group III were 56±41.3 nmol/l, 31.9±24.4 nmol/l, 9±5.7 nmol/l, respectively (Group I vs Group Ill, p<0.001; Group II vs Group III, p<0,03; Group I vs Group II, p>0.05). Vitamin D levels were low in 44 percent of the Group I and 60% of the Group II, which suggested that sun exposure of skin areas of hands and face may partially provide vitamin D synthesis, but may not be enough to eliminate vitamin D deficiency. All the patients in group III had vitamin D levels below normal. This study emphasizes the necessity of vitamin D fortification of food even in a sunny country where some people may not be exposed to sunlight because of inappropriate clothing or an indoor-life.

Key-words

Sunlight vitamin D osteomalacia hyperparathyroidism 

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References

  1. 1.
    Loomis F. Skin-pigment regulation of vitamin D biosynthesis in man. Science 1967, 157: 501–506.PubMedCrossRefGoogle Scholar
  2. 2.
    Reichel H., Koeffler P., Norman A.W. The role of the vitamin D endocrine system in health and disease. N. Engl. J. Med. 1989, 320: 986–991.CrossRefGoogle Scholar
  3. 3.
    Holick M.F., McCollum Award lecture, 1994. Vitamin D-new horizons for the 21st century. Am. J. Clin. Nutr. 1994, 60: 619–630.PubMedGoogle Scholar
  4. 4.
    McLaughlin M., Fairney A., Lester E., Raggatt P.P., Brown D.J., Wills M.R. Seasonal variation in serum 25 hydroxycholecalciferol in healthy people. Lancet 1974, 11: 536–538.CrossRefGoogle Scholar
  5. 5.
    Matsuoka L.Y., Ide L., Wortsman J., MacLaughlin J.A., Holick M.F. Sunscreens suppress cutaneous vitamin D3 synthesis. J. Clin. Endocrinol. Metab. 1987, 6: 1165–1168.CrossRefGoogle Scholar
  6. 6.
    Webb Ar., Kline L., Holick J.A. Influence of season and latitude on the cutaneous synthesis of vitamin D3: Exposure to winter sunlight in Boston and Edmonton will not promote vitamin D3 synthesis in human skin. J. Clin. Endocrinol. Metab. 1988, 2: 373–377.CrossRefGoogle Scholar
  7. 7.
    Haddad J.G. Vitamin D- solar rays, the milky way or both. N. Engl. J. Med. 1992, 18: 1213–1215.CrossRefGoogle Scholar
  8. 8.
    Goor Y., Rubinstein A. Vitamin D levels in dark- skinned people. Isr. J. Med. Sci. 1995, 31: 237–238.PubMedGoogle Scholar
  9. 9.
    Matsuoka L.Y., Wortsman J., Danneberg M.J., Hollis B.W., Lu Z., Hollis M.F. Clothing prevents ultraviolet B radiation-dependent photosynthesis of vitamin D3. J. Clin. Endocrinol. Metab. 1992, 4: 1099–1103.Google Scholar
  10. 10.
    Sedrani S.H., Elidrissy A.W., El Arabi K.M. Sunlight and vitamin D status in Saudi subjects. Am. J. Clin. Nutr. 1983, 38: 129–132.PubMedGoogle Scholar
  11. 11.
    Fonseca V., Tongia R., el-Hazmi M., Abu-Aisha H. Exposure to sunlight and vitamin D deficiency in Saudi Arabian women. Postgrad. Med. J. 1984, 60: 589–591.PubMedCentralPubMedCrossRefGoogle Scholar
  12. 12.
    McKenna M. J. Differences in vitamin D status between countries in young adult and elderly. Am. J. Med. 1992, 7: 69–77.CrossRefGoogle Scholar
  13. 13.
    Jacob A.I., Sallman A., Santiz S., Hollis B.W. Defective photoproduction of cholecalciferol in normal and uremic humans. J. Nutr. 1984, 114: 1313–1319.PubMedGoogle Scholar
  14. 14.
    DeHoog S. The assessment of nutritional status. In: Mahan L.K., Escott-Stump S. (Eds.), Krause’s Food, Nutrition, and Diet Therapy, ed. 9. W. B. Saunders, Philadelphia, 1996, p. 361.Google Scholar
  15. 15.
    Gupta M.M., Round J.M., Stamp T.C.B. Spontaneous cure of vitamin-D deficiency in Asian during summer in Britain. Lancet 1974, 14: 586–588.CrossRefGoogle Scholar
  16. 16.
    Robson J., Diffey B.L. Textile and sun protection. Photodermatol. Photoimmunol. Photomed. 1990, 7: 32–34.PubMedGoogle Scholar
  17. 17.
    Groen J.J., Eshchar J., Ben-Ishay D., Alkan W.J., Ben Assa B.I. Osteomalacia among the bedouin of the Negev desert. Arch. Intern. Med. 1965, 8: 195–204.CrossRefGoogle Scholar
  18. 19.
    Stamp T.C.B., Haddad T.G., Twigg C.A. Comparison of oral 25-hydroxycholecalciferol, vitamin D, and ultraviolet light as determinants of circulating 25-hydroxyvitamin D. Lancet 1977, 26: 1341–1343.CrossRefGoogle Scholar
  19. 20.
    Aksnes L., Rödland O., Odegaard O.R., Bakke K.J., Aarskog D. Serum levels of vitamin D metabolites in elderly. Acta. Endocrinol. (Copenh) 1989, 121: 27–33.Google Scholar
  20. 21.
    Shaunak S., Ang L., Maxwell J. D. Osteomalacia presenting as a pathological fracture during pregnancy in Asian women of high social class. Br. Med. J. 1985, 16: 1215.CrossRefGoogle Scholar
  21. 22.
    Weisman Y., Salama R., Harell A., Edelstein S. Serum 24,25-dihydroxyvitamin D and 25- hydroxyvitamin D concentration in femoral neck fracture. Br. Med. J. 1978, 2: 1196–1197.PubMedCentralPubMedCrossRefGoogle Scholar

Copyright information

© Italian Society of Endocrinology (SIE) 2000

Authors and Affiliations

  • Faruk Alagöl
    • 1
  • Y. Shihadeh
    • 1
  • H. Boztepe
    • 1
  • R. Tanakol
    • 1
  • S. Yarman
    • 1
  • H. Azizlerli
    • 1
  • Ö. Sandalci
    • 1
  1. 1.Division of Endocrinology and Metabolism, Department of Internal MedicineIstanbul Faculty of MedicineIstanbulTurkey

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