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Fat hydrogenation is the process of combining unsaturated fat with hydrogen in order to partially or completely convert it into saturated fat. Typically this hydrogenation is done with liquid vegetable oils resulting in solid or semi-solid fats .
Trans fat can be an unintentional byproduct of the industrial processing of oils. Unlike naturally derived trans fats, the trans fats that result from hydrogenation consist of many isomers. In food production, liquid cis-unsaturated fats such as vegetable oils are hydrogenated to produce more saturated fats, which have desirable properties:
Full hydrogenation of a fat or oil produces a fully saturated fat. However, hydrogenation generally was interrupted before completion, to yield a fat product with specific melting point, hardness, and other properties. Partial hydrogenation turns some of the cis double bonds into trans bonds by an isomerization reaction.
The snacks with hydrogenated oils and trans fats are “notorious for increasing ‘bad’ LDL cholesterol and decreasing ‘good’ HDL cholesterol,” Richter said. She also added that:
Generally, however, these guidelines agree that highly processed foods contain high amounts of total and added sugars, fats, and/or salt, low amounts of dietary fiber, use industrial ingredients ...
It's expected that the FDA will be announcing a nearly total ban on the use of trans fats, also known as partially hydrogenated oils. Though it was a popular ingredient for decades, research ...
Since 2010, vegetable oils and fats sold to consumers directly must contain only 2% of trans fat over total fat, and other food must contain less than 5% of their total fat. [9] Starting on 10 December 2014, Argentina has on effect a total ban on food with trans fat, a regulation that could save the government more than US$100 million a year on ...
An unsaturated fat is a fat or fatty acid in which there is at least one double bond within the fatty acid chain. A fatty acid chain is monounsaturated if it contains one double bond, and polyunsaturated if it contains more than one double bond.