Lipid Class Specific Quantitative Analysis of n-3 Polyunsaturated Fatty Acids in Food Supplements

verfasst von

Laura Kutzner, Annika I Ostermann, Thade Konrad, Dieter Riegel, Stefan Hellhake, Jan Philipp Schuchardt, Nils Helge Schebb

Abstract

Supplementation products containing n-3 PUFA from marine sources serve a large market. Although the amount of eicosapentaenoic acid and docosahexaenoic acid in the products is provided by the manufacturer, no or little information is available on their lipid pattern. Therefore, we quantitatively analyzed the fatty acid pattern in the lipid fractions triglycerides, phospholipids, ethyl esters, and free fatty acids in supplementation products by means of solid phase extraction and gas chromatography. Twelve products from the European and U.S. markets containing fish, krill, algal, or plant oil were analyzed. Total n-3 PUFA content ranged from 68 g/100 g fat (fish oil) to 42 g/100 g fat (algal oil) to 17 g/100 g fat (krill oil). On the basis of the n-3 PUFA containing lipid class, the supplements can be separated dominantly in ethyl ester, re-esterified triglyceride, triglyceride, and phospholipid containing products. Algae-based products contained natural triglycerides, krill oils a complex mixture of phospholipids, triglycerides, and free fatty acids, and fish oil products either ethyl esters, re-esterified triglycerides, or triglycerides. Even products of the same class and source showed distinct differences in their lipid pattern. A specification of the lipid composition of n-3 PUFA products would allow distinguishing the different (qualities of) supplements.

Organisationseinheit(en)

Institut für Lebensmittelwissenschaft und Humanernährung
Abteilung Ernährungsphysiologie und Humanernährung

Externe Organisation(en)

Stiftung Tierärztliche Hochschule Hannover
Bergische Universität Wuppertal

Typ

Artikel

Journal

Journal of Agricultural and Food Chemistry

Band

65

Seiten

139-147

Anzahl der Seiten

9

ISSN

0021-8561

Publikationsdatum

11.01.2017

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Agrar- und Biowissenschaften (insg.), Chemie (insg.)

Ziele für nachhaltige Entwicklung

SDG 14 – Lebensraum Wasser

Elektronische Version(en)

https://doi.org/10.1021/acs.jafc.6b03745 (Zugang: Geschlossen)