Oils Triglycerides with high unsaturated

Unsaturated fatty acids such as DHA (mentioned earlier), eicosapentaenoic (EPA), arachidonic, y-linolenic and linoleic acids, and their alkali metal salts or esters are unstable, since air oxidation easily occurs at the double-bond site. Hence, plant and fish oils, which contain many triglycerides with a high proportion of unsaturated fatty acids, are easily oxidized, resulting in loss of stability in storage. It was considered difficult to stabilize triglycerides with CyDs since triglycerides are large molecules, but the use of y-CyD has allowed plant and fish oils to be stabilized [22]. 

Glycerides are major components of edible oils. Those which contain fatty acids with a relatively high degree of unsaturation are thought to provide benefits in the diet. The ability of highly unsaturated oils to polymerize in the presence of air has made them useful for paints. Glycerides that contain a predominance of saturated fatty acids can be converted to salts by treatment with bases (saponification). Sodium and potassium salts are useful for soaps, whereas lithium salts are components of lubricants. Triglycerides from seed oils possibly represent the most likely substitute for petroleum in the future. 

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