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Nutrients. 2018 Aug 9;10(8). pii: E1054. doi: 10.3390/nu10081054.

Vitamin D Fortification of Fluid Milk Products and Their Contribution to Vitamin D Intake and Vitamin D Status in Observational Studies-A Review.

Author information

1
Department of Food and Nutrition, P.O. Box 66, 00014 University of Helsinki, 00790 Helsinki, Finland. suvi.itkonen@helsinki.fi.
2
Department of Food and Nutrition, P.O. Box 66, 00014 University of Helsinki, 00790 Helsinki, Finland. maijaliisa.erkkola@helsinki.fi.
3
Department of Food and Nutrition, P.O. Box 66, 00014 University of Helsinki, 00790 Helsinki, Finland. christel.lamberg-allardt@helsinki.fi.

Abstract

Fluid milk products are systematically, either mandatorily or voluntarily, fortified with vitamin D in some countries but their overall contribution to vitamin D intake and status worldwide is not fully understood. We searched the PubMed database to evaluate the contribution of vitamin D-fortified fluid milk products (regular milk and fermented products) to vitamin D intake and serum or plasma 25-hydroxyvitamin D (25(OH)D) status in observational studies during 1993⁻2017. Twenty studies provided data on 25(OH)D status (n = 19,744), and 22 provided data on vitamin D intake (n = 99,023). Studies showed positive associations between the consumption of vitamin D-fortified milk and 25(OH)D status in different population groups. In countries with a national vitamin D fortification policy covering various fluid milk products (Finland, Canada, United States), milk products contributed 28⁻63% to vitamin D intake, while in countries without a fortification policy, or when the fortification covered only some dairy products (Sweden, Norway), the contribution was much lower or negligible. To conclude, based on the reviewed observational studies, vitamin D-fortified fluid milk products contribute to vitamin D intake and 25(OH)D status. However, their impact on vitamin D intake at the population level depends on whether vitamin D fortification is systematic and policy-based.

KEYWORDS:

25-hydroxyvitamin D; dairy; vitamin D; vitamin D fortification; vitamin D intake; vitamin D-fortified milk

PMID:
30096919
PMCID:
PMC6116165
DOI:
10.3390/nu10081054
[Indexed for MEDLINE]
Free PMC Article

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