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To: epicure who wrote (8995)11/13/2006 12:32:12 PM
From: Karen Lawrence  Read Replies (1) of 51693
 
Well, thanks for that. I didn't know extremely warm temps - summer - can alter oils. I didn't see sesame oil among those, though. Just found this: Sesame oil is unique in that has the highest concentrations of omega-6 fatty acids. At the same time, the oil contains two natural-occurring preservatives, sesamol and sesamin. Sesame oil is the only oil which has a high percentage of polyunsaturates and also keeps and room temperature. (Olive oil also keeps at room temperature, but it is predominately composed of the omega-9 monounsaturated oil.)

Sesame oil, like all fats and oils, are chemically active. But it is precisely that chemical activity that gives them their powerful effects in our bodies. Their primary action is to combine with oxygen. Its the fatty acids in hemoglobin that transports oxygen to our cells, and the fatty acids in the cell walls that transport oxygen across the cell membranes. In short, its how we breathe.

But when oils and fats combine with oxygen outside our bodies, they turn rancid.
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