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 ?
In general, saturated fats increase inflammation and unsaturated fats reduce inflammation.
This is why getting a lot of antioxidants in your foods and supplements are so important if your diet is high in unsaturated fats.
This ratio has decreased significantly in treatment of unsaturated fat acid plus antioxidants.
But again, the picture concerning unsaturated fats is not clear-cut.
Appel and his associates to compare a carbohydrate-rich diet similar to the DASH diet with two investigational modifications: one boosted protein levels, especially plant protein, while reducing carbohydrates, and the other increased unsaturated fat, especially monounsaturated fat, while also reducing carbohydrates.
WHY are unsaturated fats healthier than saturated fats?
Vegetable oils, avocados, nuts, and seeds are good sources of unsaturated fat.
Nuts, such as almonds and walnuts, and seeds, including sunflower, pumpkin, and chia seeds, are good sources of unsaturated fat, as are most liquid vegetable oils (olive, canola, corn, sunflower, soybean, almond, and flaxseed oils, among others).
Canola oil is now eligible to bear a qualified health claim on its ability to reduce the risk of coronary heart disease (CHD) due to its unsaturated fat content.
The healthy diets comprised a carbohydrate rich diet similar to the DASH diet, a protein rich diet where about half the protein was obtained from plant sources, and a diet rich in unsaturated fat, primarily monounsaturated fats.
Even dressings that have 2 or 3 grams of sat fat typically get it from those oils, which have enough cholesterol-towering unsaturated fat to neutralize their cholesterol-raising saturated fat.
Another type of unsaturated fat - Omega 3 essential fatty acids - is found in fish oil and oily fish such as herring, mackerel, sardines, salmon and trout.