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Stability and bioavailability of vitamin D nanoencapsulated in casein micelles

Content Provider	Royal Society of Chemistry (RSC)
Author	Nodelman, Marina Livney, Yoav D. Haham, Michal Segal, Elena Duek, Irit Kustanovich, Marina Ish-Shalom, Sophia
Copyright Year	2012
Abstract	We have previously introduced the potential of casein micelles (CM) as natural nanovehicles for hydrophobic nutraceuticals, e.g. vitamin D (VD) (E. Semo, E. Kesselman, D. Danino and Y. D. Livney, Food Hydrocolloids, 2007, 21, 936–942). The aims of the current study were to improve performance by adding an ultra-high-pressure homogenization step, and to evaluate the protection conferred by re-assembled CM (rCM) against VD thermal and oxidative degradation, and the bioavailability of VD3 in rCM, by a clinical trial. Dynamic-light-scattering showed that VD3-rCM had a diameter of 91 ± 8 nm (average ± standard error). When VD3 was encapsulated in rCM and subjected to thermal treatment (80 °C, 1 min), no significant loss was observed (P > 0.05), compared to 13 and 14% loss of VD3 emulsified with Tween-80 (a synthetic emulsifier typically used for VD solubilization) and of unencapsulated VD3 respectively (P < 0.05). VD3 in rCM was also more stable during 28 d cold storage (∼40% loss) compared to Tween-80 emulsified (∼50% loss) or to un-encapsulated (∼70% loss) VD3. Ultra-high-pressure homogenization of VD3-rCM (∼155 MPa) significantly enhanced vitamin stability, resulting in only ∼10% loss after 28 d of storage. Bioavailability of a single-dose of 50 000 international-units (IU) VD3 encapsulated in rCM, in 1% fat milk, investigated in a randomized double blinded placebo controlled clinical study with 87 human volunteers, was at least as high as that using an aqueous Tween-80-emulsified VD3 supplement. We conclude that ultra-high-pressure homogenization treated rCM protect VD3 against heat- and storage-induced degradation, and VD3 encapsulated in rCM is highly bioavailable.
Starting Page	737
Ending Page	744
Page Count	8
File Format	HTM / HTML PDF
ISSN	20426496
Volume Number	3
Issue Number	7
Journal	Food & Function
DOI	10.1039/c2fo10249h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Semo Kesselman Danino Livney Casein Hydrophobe Vitamin D Michel Danino Bioavailability Clinical trial Standard error Emulsion Fat Placebo
Content Type	Text
Resource Type	Article
Subject	Medicine Food Science

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