Phylloquinone Intakes and Food Sources and Vitamin K Status in a Nationally Representative Sample of Irish Adults
| Autor: | Mairead Kiely, Janette Walton, Kevin D. Cashman, Áine Hennessy, Breige A. McNulty, Aoife Hayes, Alice J. Lucey, Albert Flynn |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
Male 0301 basic medicine Adolescent Food diary Medicine (miscellaneous) Phylloquinone intake Vitamin k Diet Surveys Young Adult 03 medical and health sciences Environmental health Humans Medicine Undercarboxylated osteocalcin 030109 nutrition & dietetics Nutrition and Dietetics biology business.industry Nutritional Requirements Vitamin K 1 Vitamin K intake Middle Aged Diet Records Osteocalcin biology.protein Population study Female business Biomarkers Food Analysis Recommended Intake |
| Zdroj: | The Journal of Nutrition. 146:2274-2280 |
| ISSN: | 0022-3166 |
| Popis: | BACKGROUND Data from a nationally representative sample of 18- to 64-y-old Irish adults conducted in 1999 highlighted low phylloquinone intakes. That survey, however, did not include older adults (aged ≥65 y), a subgroup that is potentially at higher risk of low phylloquinone intakes, or a biomarker of vitamin K status. OBJECTIVES The objectives of this work were to measure the phylloquinone intake and its adequacy and the serum percentage of undercarboxylated osteocalcin (%ucOC), a vitamin K status biomarker, in a nationally representative sample of Irish adults aged 18-90 y, and to compare these newer data on dietary phylloquinone in adults aged 18-64 y with those from the previous survey. METHODS Data and biobanked serum samples from the National Adult Nutrition Survey, a randomly selected sample of Irish adults aged 18-90 y (N = 1500), were accessed. Phylloquinone intakes were estimated from 4-d food diary data and were compared across age groups (18-35, 36-50, 51-64, and ≥65 y). Serum %ucOC was assessed by immunoassay (n = 692). RESULTS The mean ± SD intake of phylloquinone from all sources was 85.2 ± 59.1 μg/d, 99% of which was derived from food. Phylloquinone intakes and serum %ucOC were significantly (P 0.2 in all cases). Mean phylloquinone intakes had increased (P < 0.01) modestly (6 μg/d) in 18-64-y-olds across a decade. Of the total study population, 55% had phylloquinone intakes below the United Kingdom recommended intake of 1 μg ⋅ kg body weight-1 ⋅ d-1 CONCLUSION: Our study shows that younger adults (aged 18-35 y) appear to be at higher risk of inadequate vitamin K intake and lower vitamin K status, the health implications of which are unclear and warrant further investigation. |
| Databáze: | OpenAIRE |
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