Dictionary of Human Evolution and Biology

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Polyunsaturated Fatty Acid

Long carbohydrate chain that contains triglycerides and more than one double bond, and with two or more missing hydrogen atoms. Examples include fish oils and vegetable oils (e.g. safflower and sunflower). Humans cannot produce polyunsaturated fatty acids; hence these essential fatty acids are acquired from dietary sources. Essential fatty acids include linoleic acid, arachidonic acid, and linolenic acid.

See unsaturated fatty acid.

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