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In biochemistry and nutrition, a polyunsaturated fat is a fat that contains a polyunsaturated fatty acid (abbreviated PUFA), which is a subclass of fatty acid characterized by a backbone with two or more carbon–carbon double bonds. [1] [2] Some polyunsaturated fatty acids are essentials.
Omega-3 fatty acids, also called ω−3 fatty acids or n−3 fatty acids, [1] are polyunsaturated fatty acids (PUFAs). Omega−3 fatty acids are important for normal metabolism.
For example, α-linolenic acid (ALA; illustration) is an 18-carbon chain having three double bonds, the first located at the third carbon from the methyl end of the fatty acid chain. Hence, it is an omega−3 fatty acid. Counting from the other end of the chain, that is the carboxyl end, the three double bonds are located at carbons 9, 12, and 15.
Examples include high-fructose corn syrup, glucose, fructose, and raw sugar. ... be mindful of foods that are high in polyunsaturated fatty acids, or PUFAs, such as vegetable oils (e.g. corn ...
For example, a recent large meta-analysis found that replacing some saturated fats with polyunsaturated fats (like seed oils) was associated with a lower risk of cardiovascular disease and type 2 ...
The evening primrose flower (O. biennis) produces an oil containing a high content of γ-linolenic acid, a type of omega−6 fatty acid.Omega−6 fatty acids (also referred to as ω−6 fatty acids or n−6 fatty acids) are a family of polyunsaturated fatty acids (PUFA) that share a final carbon-carbon double bond in the n−6 position, that is, the sixth bond, counting from the methyl end.
Polyunsaturated fatty acids with 16- and 18-carbon chains are sometimes classified as short chain polyunsaturated fatty acids (SC-PUFA), as opposed to long-chain polyunsaturated fatty acids (LC-PUFA), which have more than 18 carbon atoms. [11] Both the essential fatty acids are SC-PUFA with an 18-carbon chain: ω−3 fatty acid:
Crotonic acid has 4 carbons, is included in croton oil, and is a trans-2-mono-unsaturated fatty acid.C 3 H 5 CO 2 H, IUPAC organization name (E)-but-2-enoic acid, trans-but-2-enoic acid, numerical representation 4:1, n-1, molecular weight 86.09, melting point 72–74 °C, boiling point 180–181 °C, specific gravity 1.027.