| Autor: |
Van Loo-Bouwman CA; Department of Gastroenterology and Hepatology, Radboud University Nijmegen Medical Centre, Geert Grooteplein 8, 6525 GA Nijmegen, The Netherlands., Naber TH; Department of Gastroenterology and Hepatology, Radboud University Nijmegen Medical Centre, Geert Grooteplein 8, 6525 GA Nijmegen, The Netherlands., Schaafsma G; Schaafsma Advisory Services in Food, Health and Safety, Rembrandtlaan 12, 3925 VD, Scherpenzeel, The Netherlands. |
| Jazyk: |
angličtina |
| Zdroj: |
The British journal of nutrition [Br J Nutr] 2014 Jun 28; Vol. 111 (12), pp. 2153-66. Date of Electronic Publication: 2014 Feb 11. |
| DOI: |
10.1017/S0007114514000166 |
| Abstrakt: |
Vitamin A equivalency of β-carotene (VEB) is defined as the amount of ingested β-carotene in μg that is absorbed and converted into 1 μg retinol (vitamin A) in the human body. The objective of the present review was to discuss the different estimates for VEB in various types of dietary food matrices. Different methods are discussed such as mass balance, dose-response and isotopic labelling. The VEB is currently estimated by the US Institute of Medicine (IOM) as 12:1 in a mixed diet and 2:1 in oil. For humans consuming β-carotene dissolved in oil, a VEB between 2:1 and 4:1 is feasible. A VEB of approximately 4:1 is applicable for biofortified cassava, yellow maize and Golden Rice, which are specially bred for human consumption in developing countries. We propose a range of 9:1-16:1 for VEB in a mixed diet that encompasses the IOM VEB of 12:1 and is realistic for a Western diet under Western conditions. For a 'prudent' (i.e. non-Western) diet including a variety of commonly consumed vegetables, a VEB could range from 9:1 to 28:1 in a mixed diet. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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