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Comparison of plasma responses in human subjects after the ingestion of 3R,3R′-zeaxanthin dipalmitate from wolfberry (Lycium barbarum) and non-esterified 3R,3R′-zeaxanthin using chiral high-performance liquid chromatography

Published online by Cambridge University Press:  09 March 2007

Dietmar E. Breithaupt ,
Philipp Weller ,
Maike Wolters  and
Andreas Hahn
Dietmar E. Breithaupt*
Affiliation:
Institute for Food Chemistry, University of Hohenheim, Garbenstrasse 28, 70593, Stuttgart, Germany
Philipp Weller
Affiliation:
Institute for Food Chemistry, University of Hohenheim, Garbenstrasse 28, 70593, Stuttgart, Germany
Maike Wolters
Affiliation:
Institute of Food Science, University of Hannover, Wunstorfer Strasse 14, 30453, Hannover, Germany
Andreas Hahn
Affiliation:
Institute of Food Science, University of Hannover, Wunstorfer Strasse 14, 30453, Hannover, Germany
*
*Corresponding author: Dr D. E. Breithaupt, fax +49 711 4594096, email [email protected]
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Abstract

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Age-related macular degeneration (AMD) is one of the most common eye diseases of elderly individuals. It has been suggested that lutein and zeaxanthin may reduce the risk for AMD. Information concerning the absorption of non-esterified or esterified zeaxanthin is rather scarce. Furthermore, the formation pathway of meso (3R,3′S)-zeaxanthin, which does not occur in plants but is found in the macula, has not yet been identified. Thus, the present study was designed to assess the concentration of 3R,3R′-zeaxanthin reached in plasma after the consumption of a single dose of native 3R,3′R-zeaxanthin palmitate from wolfberry (Lycium barbarum) or non-esterified 3R,3′R-zeaxanthin in equal amounts. In a randomised, single-blind cross-over study, twelve volunteers were administered non-esterified or esterified 3R,3′R-zeaxanthin (5 mg) suspended in yoghurt together with a balanced breakfast. Between the two intervention days, a 3-week depletion period was inserted. After fasting overnight, blood was collected before the dose (0 h), and at 3, 6, 9, 12, and 24 h after the dose. The concentration of non-esterified 3R,3′R-zeaxanthin was determined by chiral HPLC. For the first time, chiral liquid chromatography–atmospheric pressure chemical ionisation-MS was used to confirm the appearance of 3R,3′R-zeaxanthin in pooled plasma samples. Independent of the consumed diet, plasma 3R,3′R-zeaxanthin concentrations increased significantly (P=0·05) and peaked after 9–24 h. Although the concentration curves were not distinguishable, the respective areas under the curve were distinguishable according to a two-sided F and t test (P=0·05). Thus, the study indicates an enhanced bioavailability of 3R,3′R-zeaxanthin dipalmitate compared with the non-esterified form. The formation of meso-zeaxanthin was not observed during the time period studied.

Keywords

3R,3′R-zeaxanthinZeaxanthin estersPlasma carotenoid responseChiral analysisLiquid chromatography–atmospheric pressure chemical ionisation-mass spectrometry
Type
Research Article
Information
British Journal of Nutrition , Volume 91 , Issue 5 , May 2004 , pp. 707 - 713
Copyright
Copyright © The Nutrition Society 2004

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