Evening primrose oils fatty acid composition

Table 4.1 Typical fatty acid composition of evening primrose and borage oils...

Oils used mainly for the health benefits of specific fatty acids are always a potential source of adulteration. Chapter 4 investigates three types of these oils fish oils, evening primrose oil and borage oil (once used as an adulterant of evening primrose oil, but now an acknowledged oil in its own right). The first two are reasonably well defined, but fish oils—because of the range of sources and compositions—still present a problem for analysts. 

The fatty acid compositions of borage and evening primrose oils were also modified by incorporation of EPA using hpase PS-30 from Pseudomonas sp. as the biocatalyst (58). After acidolysis reaction, borage oil-based structured lipid contained 26.8% EPA and 15.2% GLA. Meanwhile, evening primrose oil-based structured lipid had EPA and GLA contents of 25.2% and 7.6%, respectively (58). 

Production of structured lipids containing GLA, EPA, and DHA may also be achieved using borage and evening primrose oils as sources of GLA and either EPA or DHA or their combinations (38,39). The products obtained, although similar to those produced by incorporation of GLA into marine oils, differed in their composition and distribution of other fatty acids. 

Table 9.1.7 Fatty acid composition of evening primrose oil in %.

Table 4. Fatty acid composition of evening primrose oil, borage oil, and blackcurrant oil and of oils from Mortierella isabelina and Mucor javamcus ...

The fatty acid compositions of borage and evening primrose oils were also modified by incorporation of EPA using lipase PS-30 from Pseudomonas sp. as... 

There are a number of minor oils, all of high value, most of which are marketed mainly either for medical purposes or for their flavour. Olive, evening primrose, borage, fish oils and cocoa butter are described elsewhere. Others include hazelnut, walnut, macadamia, almond, apricot, pumpkin, poppy-seed and rice bran oils. The process of testing for authenticity of these oils should be approached in the same way as for the bulk oils above, i.e. fatty acid profile, sterols, tocopherols and triglyceride composition. However, there is little generally available published material on the ranges of values to be expected... 

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