In:
British Journal of Nutrition, Cambridge University Press (CUP), Vol. 112, No. 12 ( 2014-12-28), p. 1993-2001
Abstract:
Fortification with the essential trace element iodine is widespread worldwide. In the present study, results on iodine excretion and intake of iodine-rich foods from a cross-sectional study carried out in 2004–5, 4 to 5 years after the implementation of mandatory iodine fortification, were compared with data in a study carried out in 2008–10. The 2008–10 study was a follow-up of a cross-sectional study carried out before iodine fortification was implemented. Participants in the cross-sectional studies were randomly selected. Both studies were carried out in the cities of Aalborg and Copenhagen in Denmark. The median urinary iodine concentration decreased in women from 97 μg/l ( n 2862) to 78 μg/l ( n 2041) ( P 〈 0·001). The decrease persisted after adjustment for age, city and education, and if expressed as estimated 24 h iodine excretion. The prevalence of users of iodine containing dietary supplements increased from 29·4 to 37·3 % ( P 〈 0·001). The total fluid intake increased in women ( P 〈 0·001), but the intake of other iodine-rich foods did not change. The median urinary iodine concentration did not change in men (114 μg/l ( n 708) and 107 μg/l ( n 424), respectively), while the total fluid intake decreased ( P = 0·001). Iodine content was measured in milk sampled in 2000–1 and in 2013. The iodine content was lower in 2013 (12 ( sd 3) μg/100 g) compared with that in 2000–1 (16 ( sd 6) μg/100 g) ( P 〈 0·001). In conclusion, iodine excretion in women has decreased below the recommended level. The reason might probably, at least partly, be a decreased content of iodine in milk.
Type of Medium:
Online Resource
ISSN:
0007-1145
,
1475-2662
DOI:
10.1017/S0007114514003225
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
2014
detail.hit.zdb_id:
2016047-1
SSG:
12
SSG:
21
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