An unsaturated fat is a fat that contains a carbon-carbon double bond, or a fat containing unsaturated fatty acids; such fatty acids have double or triple covalent bonds and are thus able to add more atoms. Unsaturated fats are believed to lower blood cholesterol levels and are found at high levels in vegetable oils (olive oil, safflower oil, etc.)

As a general rule, unsaturated fats are liquid at room temperature.

From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.

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