Polyunsaturated fatty acids (PUFAs) contain:

Polyunsaturated fatty acids (PUFAs) are characterized by having multiple double bonds in their carbon chain. Each double bond introduces a point of unsaturation, making the molecule less saturated compared to fatty acids that contain no double bonds or only one double bond. This structural feature is crucial because it influences the physical and chemical properties of the fatty acids, such as their fluidity and stability at room temperature.

Furthermore, PUFAs are essential in human nutrition because they play vital roles in biological functions, including cell membrane structure and function, as well as being precursors to important signaling molecules in the body. Examples of polyunsaturated fatty acids include omega-3 and omega-6 fatty acids, both of which are vital for overall health and must be obtained through diet.