Title |
Trans Isomers of EPA and DHA in Omega‐3 Products on the European Market
|
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Published in |
Lipids, May 2012
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DOI | 10.1007/s11745-012-3672-3 |
Pubmed ID | |
Authors |
Caterina Sciotto, Svein A. Mjøs |
Abstract |
The levels of trans isomers of eicosapentaenoic (EPA) acid and docosahexaenoic acid (DHA) in 77 omega-3 products on the European market have been studied. Fatty acids were analyzed as fatty acid methyl esters by gas chromatography with a flame ionization detector, using a cyanopropyl coated stationary phase. The amount of mono-trans EPA isomers relative to the corresponding all-cis isomer ranged from 0.19 to 4.5 %. The corresponding values for mono-trans DHA relative to the all-cis isomer ranged from 0.25 to 5.9 %. There was a strong correlation between the degree of isomerization of EPA and DHA, showing that DHA was 1.26 times more isomerized than EPA. Division of the samples into different product groups showed that samples with a low degree of isomerization were found in all groups, except one. This shows that a high degree of isomerization is avoidable, and also points to deodorization of the oils as the main source of trans isomers. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Unknown | 1 | 100% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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United States | 1 | 4% |
Australia | 1 | 4% |
Unknown | 23 | 92% |
Demographic breakdown
Readers by professional status | Count | As % |
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Researcher | 6 | 24% |
Other | 4 | 16% |
Student > Ph. D. Student | 4 | 16% |
Professor > Associate Professor | 3 | 12% |
Student > Master | 2 | 8% |
Other | 2 | 8% |
Unknown | 4 | 16% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 13 | 52% |
Biochemistry, Genetics and Molecular Biology | 2 | 8% |
Environmental Science | 1 | 4% |
Computer Science | 1 | 4% |
Medicine and Dentistry | 1 | 4% |
Other | 1 | 4% |
Unknown | 6 | 24% |