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Essential fatty acid
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==Structure == Essential fatty acids have double bonds between adjacent carbon atoms :C=C: which are destroyed during hydrogenation, so hydrogenated oils lack important EFAs. Animal fats naturally are low in such bonds and also lack important EFAs. Fats with fewer of these specific bonds tend to be more solid at room temperature (they stack more closely because the double bonds make the structure more irregular, and less or no double bonds make the structure more regular so the molecules fit more closely together). <ref name="Holum1994">{{Cite book |last =Holum|first =John R. | title =Fundamentals of General, Organic, and Biological Chemistry|edition=5th|location =New York | date = 1994| publisher = John Wiley & Sons, Inc | page = 786}}</ref><ref name="Medline">{{Cite web | url=https://medlineplus.gov/ency/patientinstructions/000104.htm | title = Dietary fats explained | last = | first = | authorlink = | date = | website = MedlinePlus Medical Encyclopedia|language=en|archive-url=|archive-date=|url-status=|access-date=2021-03-14}}</ref><ref name="merck">{{Cite web | url=https://www.merckmanuals.com/professional/nutritional-disorders/undernutrition/essential-fatty-acid-deficiency | title = Essential Fatty Acid Deficiency - Nutritional Disorders | date = Jan 2021 | last = Morley | first = John B|website=Merck Manuals Professional Edition|language=en-US|access-date=2021-03-14}}</ref><ref name="hopes">{{Cite web | url=https://hopes.stanford.edu/fatty-acids/ | title = Fatty Acids | last = McGee | first = D | date = Apr 27, 2005 | website = HOPES (Huntington's Outreach Project for Education, at Stanford)|language=en-US|access-date=2021-03-14}}</ref>
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