n–3 PUFA is present in all except –
Correct Answer: Groundnut oil
Description: POLYUNSATURATED FATTYACEDS
Polyunsaturated fatty acids have more than one double bond. According to the position of first double bond they or divided into
1) n-3 fatty acids or ω-3 fatty acids or omega-3 fatty acids
This are long-chain polyunsaturated fatty acids, with first double bond beginning at the third carbon atom (when counting form the methyl end of fatty acid).
Example are α- linolenic acid, Timnodonic (Eicosapentaenoic) acid, cervonic (Docosahexaenoic acid).
Rich sources → wheat, bajara, mustard, fish, lobia, rajmah, black gram, soybean, green leafy vegetables.
2) n-6 or ω-6 or omega-6 fatty acids
First double bond begins at the 6th carbon atom.
Examples Linoleic acid, Arachidonic acid, γ-linolenic acid.
Rich sources → Groundnut oil & corn oil
Coming back to question
Both groundnut oil and corn oil are devoid of (0-3 fatty acids.
However, corn oil has trace amount of w-3 fatty acids.
So, best answer of this question is groundnut oil.
Following information have been added in 21st/e of Park
The WHO/FAO expert Group on diet, nutrition and prevention of chronic diseases endorse that qualitative composition of fats in the diet has a significant role to play in modifying risk factors for CHD and set the following ranges for population nutrient goals (% of energy) : -
Total fat intake, 20-30% of total energy intake (at least 20% energy is consistent with good health).
Saturated fatty acids, less than 10% of total energy intake.
PUFAs, 6-10% of total energy intake (minimum of 6%). ω-6 should be about 5-8% and ω-3 should be about 1-2%.
Trans fatty acids should be less than I% of total energy intake.
Cholesterol should be less than 300 mg a day.
It is worth noting here that above values are for prevention of CHD. However, minimum intake levels for essential fatty acids to prevent deficiency symptoms are estimated to be 2.5% of total intake for lenoleic acid and 0.5% for Lenolenic acid (ALA).
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