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Omega-9 fatty acid

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Title: Omega-9 fatty acid  
Author: World Heritage Encyclopedia
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Subject: Fatty acid, Omega-3 fatty acid, Essential fatty acid, Elaidic acid, Undecylic acid
Publisher: World Heritage Encyclopedia

Omega-9 fatty acid

Omega-9 fatty acids (ω−9 fatty acids or n−9 fatty acids) are a family of unsaturated fatty acids which have in common a final carbon–carbon double bond in the omega−9 position; that is, the ninth bond from the methyl end of the fatty acid.


Some omega−9 fatty acids are common components of animal fat and vegetable oil. Two omega−9 fatty acids important in industry are:

Unlike omega-3 fatty acids and omega-6 fatty acid, omega−9 fatty acids are not classed as essential fatty acids (EFA). This is both because they can be created by the human body from unsaturated fat, and are therefore not essential in the diet, and because the lack of an omega−6 double bond keeps them from participating in the reactions that form the eicosanoids.

Under severe conditions of EFA deprivation, mammals will elongate and desaturate oleic acid to make mead acid, (20:3, n−9).[1] This has been documented to a lesser extent in one study following vegans, vegetarians and semi-vegetarians who followed diets without substantial sources of EFA.[2]

Omega−9 fatty acids
Common name Lipid name Chemical name
oleic acid 18:1 (n−9) 9-octadecenoic acid
elaidic acid 18:1 (n−9) (E)-octadec-9-enoic acid
gondoic acid 20:1 (n−9) 11-eicosenoic acid
mead acid 20:3 (n−9) 5,8,11-eicosatrienoic acid
erucic acid 22:1 (n−9) 13-docosenoic acid
nervonic acid 24:1 (n−9) 15-tetracosenoic acid

See also


  1. ^
  2. ^

External links

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