Knowra Linoleic acid Linoleic acid Linoleic acid is an essential omega-6 fatty acid with 18 carbon atoms and cis double bonds at positions 9 and 12. Humans cannot synthesize it, so it must come from food.
Fatty acid : A carboxylic acid with a hydrocarbon chain, serving as a building block and fuel in living organisms. Linoleic acid belongs to this broad class of molecules.
Essential fatty acid : A fatty acid that an organism cannot synthesize in sufficient amounts and must obtain from its diet. Linoleic acid is essential because humans lack the enzyme needed to make it.
Alpha-linolenic acid : An essential 18-carbon omega-3 fatty acid with cis double bonds at positions 9, 12, and 15. It has the same chain length as linoleic acid but belongs to the omega-3 family.
Cell membrane : A selectively permeable boundary made mainly of lipids and proteins that encloses a cell. Linoleic acid is incorporated into membrane phospholipids and affects their composition.
Omega-6 fatty acid : A polyunsaturated fatty acid whose first double bond lies six carbon atoms from the methyl end. Linoleic acid is the dietary precursor that defines this fatty-acid family.
Dietary fat : Fat consumed in food, supplying energy and fatty acids needed for cell structures and biological functions. Foods provide the linoleic acid that human metabolism cannot produce.
Oleic acid : An 18-carbon monounsaturated omega-9 fatty acid with one cis double bond at position 9. Its single double bond contrasts with linoleic acid’s two and makes it nonessential.
Inflammation : A protective biological response to tissue damage or infection involving immune, vascular, and signaling processes. Research examines whether linoleic-acid metabolism alters inflammatory signaling, rather than treating the fatty acid as inflammation itself.
Arachidonic acid : A 20-carbon omega-6 fatty acid made from linoleic acid and used to produce signaling molecules. The body elongates and desaturates linoleic acid to make this membrane fatty acid.
Seed oil : Oil extracted from the seeds of plants, often rich in unsaturated fatty acids. Many seed oils, including sunflower and safflower oils, are concentrated dietary sources.
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