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Vitamin D status in Greenland is influenced by diet and ethnicity: a population-based survey in an Arctic society in transition

  • Stig Andersen (a1) (a2), Peter Laurberg (a3), Bodil Hvingel (a4), Kent Kleinschmidt (a2), Lene Heickendorff (a5) and Leif Mosekilde (a6)...

Abstract

Vitamin D status as measured by plasma 25-hydroxyvitamin D (25(OH)D) is important to human health. Circumpolar people rely on dietary sources and societal changes in the Arctic are having profound dietary effects. The objective of the present study was to determine plasma 25(OH)D status and factors important to plasma 25(OH)D in populations in Greenland. Inuit and non-Inuit aged 50–69 years in the capital in West Greenland (latitude 64°15′N) and in a major town and remote settlements in East Greenland (latitude 65°35′N) were surveyed. Supplement use and lifestyle factors were determined by questionnaires. Inuit food scores were computed from a FFQ of seven traditional Inuit and seven imported food items. 25(OH)D2 and 25(OH)D3 levels were measured in the plasma. We invited 1 % of the population of Greenland, and 95 % participated. 25(OH)D3 contributed 99·7 % of total plasma 25(OH)D. Non-Inuit had the lowest median plasma 25(OH)D of 41 (25th–75th percentile 23–53) nmol/l compared with 64 (25th–75th percentile 51–81) nmol/l in Inuit (P< 0·001). Plasma 25(OH)D was below 20 and 50 nmol/l in 13·8 and 60·1 % of participants, respectively, with Inuit food item scores below 40 % (P< 0·001), and in 0·2 and 25·0 % of participants, respectively, with higher scores (P< 0·001). The Inuit diet was an important determinant of plasma 25(OH)D (P< 0·001) and its effect was modified by ethnicity (P= 0·005). Seal (P= 0·005) and whale (P= 0·015) were major contributors to plasma 25(OH)D. In conclusion, a decrease in the intake of the traditional Inuit diet was associated with a decrease in plasma 25(OH)D levels, which may be influenced by ethnicity. The risk of plasma 25(OH)D deficiency in Arctic populations rises with the dietary transition of societies in Greenland. Vitamin D intake and plasma 25(OH)D status should be monitored.

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Corresponding author

*Corresponding author: Dr S. Andersen, fax +45 99326108, E-mail: stiga@dadlnet.dk

References

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Keywords

Vitamin D status in Greenland is influenced by diet and ethnicity: a population-based survey in an Arctic society in transition

  • Stig Andersen (a1) (a2), Peter Laurberg (a3), Bodil Hvingel (a4), Kent Kleinschmidt (a2), Lene Heickendorff (a5) and Leif Mosekilde (a6)...

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