Health

New international dietary guidelines released

Food choices and excess body weight have now overtaken smoking as the most important preventable cause of disease. Newly updated dietary advice from the World Health Organization (WHO) on fat and carbohydrate intake is welcomed ...

Diseases, Conditions, Syndromes

On nutrition: Dealing with fatty liver disease

After reading a recent column on spirulina, MH from Dothan, Alabama, writes: "Will spirulina have an adverse effect on fatty liver disease? And do you have other information or suggestions for dealing with fatty liver disease?"

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Unsaturated fat

An unsaturated fat is a fat or fatty acid in which there are one or more double bonds in the fatty acid chain. A fat molecule is monounsaturated if it contains one double bond, and polyunsaturated if it contains more than one double bond. Where double bonds are formed, hydrogen atoms are eliminated. Thus, a saturated fat is "saturated" with hydrogen atoms. In cellular metabolism hydrogen-carbon bonds are broken down – or oxidized – to produce energy, thus an unsaturated fat molecule contains somewhat less energy (i.e fewer calories) than a comparable sized saturated fat. The greater the degree of unsaturation in a fatty acid (ie, the more double bonds in the fatty acid), the more vulnerable it is to lipid peroxidation (rancidity). Antioxidants can protect unsaturated fat from lipid peroxidation. Unsaturated fats also have a more enlarged shape than saturated fats.[citation needed]

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