
Polyunsaturated fat
Type of fatty acid defined by molecular bonds

Type of fatty acid defined by molecular bonds
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. Some polyunsaturated fatty acids – alpha-linolenic acid and linoleic acid – are called "essential" because they cannot be synthesized by humans and must be obtained from the diet. Polyunsaturated fatty acids are precursors to and are derived from polyunsaturated fats, which include drying oils.
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