unsaturated fat

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fat

 [fat]
1. the adipose tissue of the body.
2. a triglyceride (or triacylglycerol) that is an ester of fatty acids and glycerol. Each fat molecule contains one glycerol residue connected by ester linkages to three fatty acid residues, which may be the same or different. The fatty acids may have no double bonds in the carbon chain (saturated fatty acids), one double bond (monounsaturated), or two or more double bonds (polyunsaturated). Essential fatty acids cannot be synthesized by the body but must be obtained from the diet or from intravenous infusion of lipids.
Saturated and Unsaturated Fats. All of the common unsaturated fatty acids are liquid (oils) at room temperature. Through the process of hydrogenation, hydrogen can be incorporated into certain unsaturated fatty acids so that they are converted into solid fats for cooking purposes. Margarine is an example of the hydrogenation of unsaturated fatty acids into a solid substance.
brown fat a thermogenic type of adipose tissue containing a dark pigment, and arising during embryonic life in certain specific areas in many mammals, including humans (see illustration); it is prominent in the newborn. Called also brown adipose tissue.
Sites of brown fat in the neonate. From McKinney et al., 2000.
neutral fat fat (def. 2).
polyunsaturated fat a fat containing polyunsaturated fatty acids; see also fat.
saturated fat a fat containing saturated fatty acids; see also fat.
unsaturated fat a fat containing unsaturated fatty acids; see also fat.

un·sat·ur·at·ed fat·ty ac·id

a fatty acid, the carbon chain of which possesses one or more double or triple bonds (for example, oleic acid, with one double bond in the molecule, and linoleic acid, with two); called unsaturated because it is capable of absorbing additional hydrogen.

unsaturated fat

n.
Any of various fats derived from plant and some animal sources, especially fish, that are liquid at room temperature. Increasing dietary intake of unsaturated fats while reducing intake of saturated fats can reduce LDL cholesterol in the bloodstream.

unsaturated fat

An alkyl-chain fatty acid with one or more double (ethylenic) bonds between carbons (called unsaturated as the chain is capable of absorbing more hydrogen). Unsaturated fats  (UFs) have lower melting points, and most are liquid at room temperature. UFs can be monounsaturated (i.e., have one double bond, such as oleic acid), which are widely distributed in nature, or polyunsaturated (i.e., has two or more double bonds, such as linolenic acid), which are found in safflower and corn oils.

un·sat·ur·at·ed fat

(ŭn-sach'ŭr-āt-ĕd fat)
Fat containing a high proportion of unsaturated fatty acids, i.e., fatty acids with double or triple bonds between carbon atoms. May have a healthy effect on the heart when used in moderation by lowering cholesterol levels.

unsaturated fat

see FATTY ACID.
References in periodicals archive ?
Unsaturated fats are good for cutting the risk of heart disease.
Some unsaturated fats can help to lower cholesterol and provide us with the essential fatty acids we need to help us stay healthy.
Here's how you can tell the difference: Unsaturated fats remain liquid even when refrigerated, while saturated fats harden.
Jenan Canola Oil is one of the high quality edible oils produced by Al Ghurair Foods, and is considered the best and healthiest vegetable oil as it contains a high rate of unsaturated fats and is cholesterol free," said Al Ghurair adding that Canola Oil has a mark of approval by the US Food & Drug Administration (FDA) since 2006.
These good fats are called unsaturated fats, and they are divided generally into two subcategories: monounsaturated and polyunsaturated.
Good unsaturated fats from plants and fish have the opposite effect of saturated fats on cholesterol in the body.
So, as part of a healthy diet we should try to reduce the amount of foods we eat that contain hydrogenated or saturated fats and replace them with unsaturated fats.
When you look at a food label, fat is generally divided into saturated and the unsaturated fats (polyunsaturated and monounsaturated).
Consumers are more aware of trans fats than ever (91%), but more than 60% don't understand that unsaturated fats are healthful.
Dietary experts recommend that you should eat a diet high in unsaturated fats, like those found in olive oil.
As a starting point it is suggested that attention be directed towards achieving a diet high in fibre (minimum 25 g-30 g/day) (19) and which has moderate (30% of daily kilojoules) levels of primarily unsaturated fats (8,16).
Canola oil is high in healthy unsaturated fats (93%), free of cholesterol and trans fat, and the lowest in saturated fat (7%) of any common edible oil.