'''Polyunsaturated fats''' are [[triglycerides]] in which the [[hydrocarbon]] tails constitutes [[polyunsaturated fatty acid]]s (PUFA) (fatty acids possessing more than a single carbon–carbon [[double bond]]).<ref>{{cite web|last=Ordman|first= R. |year=2011|title= Introduction to fats. Unpublished manuscript|publisher= Biochemistry Program, Beloit College|location=Beloit, WI|url=http://chemistry.beloit.edu/Ordman/nutrition/essays/essayfats.htm}}</ref><ref>{{cite web|title=Chemical and Physical Structure of Fatty Acids |author= Wyn Snow| date= 30 April 2004|url=http://www.supplementquality.com/news/fatty_acid_structure.html|accessdate=2 May 2012}}</ref> Polyunsaturated fat can be found mostly in nuts, seeds, fish, algae, leafy greens, and krill. "Unsaturated" refers to the fact that the molecules contain less than the maximum amount of hydrogen. These materials exist as ''[[Cis-trans isomerism|cis]]'' or ''[[Cis-trans isomerism|trans]]'' [[Conformational isomerism|isomers]] depending on the geometry of the double bond. |
'''Polyunsaturated fats''' are [[triglycerides]] in which the [[hydrocarbon]] tails constitutes [[polyunsaturated fatty acid]]s (PUFA) (fatty acids possessing more than a single carbon–carbon [[double bond]]).<ref>{{cite web|last=Ordman|first= R. |year=2011|title= Introduction to fats. Unpublished manuscript|publisher= Biochemistry Program, Beloit College|location=Beloit, WI|url=http://chemistry.beloit.edu/Ordman/nutrition/essays/essayfats.htm}}</ref><ref>{{cite web|title=Chemical and Physical Structure of Fatty Acids |author= Wyn Snow| date= 30 April 2004|url=http://www.supplementquality.com/news/fatty_acid_structure.html|accessdate=2 May 2012}}</ref> Polyunsaturated fat can be found mostly in nuts, seeds, fish, algae, leafy greens, and krill. "Unsaturated" refers to the fact that the molecules contain less than the maximum amount of hydrogen. These materials exist as ''[[Cis-trans isomerism|cis]]'' or ''[[Cis-trans isomerism|trans]]'' [[Conformational isomerism|isomers]] depending on the geometry of the double bond. |