Define Poly unsaturated fatty acids.
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Define Poly unsaturated fatty acids.
Polyunsaturated fatty acids (PUFAs) are a type of dietary fat characterized by the presence of multiple double bonds in their chemical structure. These fatty acids are essential nutrients that the body cannot produce on its own and must be obtained through the diet.
PUFAs are classified into two main types based on the position of the first double bond from the methyl end of the fatty acid chain:
Omega-3 (n-3) PUFAs: These fatty acids have the first double bond located at the third carbon atom from the methyl end. Examples include alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA), which are found in fatty fish (such as salmon and mackerel), flaxseeds, chia seeds, and walnuts. Omega-3 PUFAs are important for heart health, brain function, and reducing inflammation.
Omega-6 (n-6) PUFAs: These fatty acids have the first double bond located at the sixth carbon atom from the methyl end. Common omega-6 PUFAs include linoleic acid (found in vegetable oils like soybean and sunflower oil) and arachidonic acid. Omega-6 PUFAs play a role in skin health, hormone production, and immune function.
Including a balance of omega-3 and omega-6 PUFAs in the diet is important for overall health and well-being.