Properties of Fats and Oils…
Hydrogenation of fats and oils:
Hydrogenation is the process of converting liquid oil to
solid fat by adding hydrogen to some of the double bond
of the unsaturated carbon chain in presence of nickel as
catalyst; e.g., Margarine .
, Trans fat
•Unsaturated fat with trans-isomer fatty acid.
•Not essential fatty acids
•Naturally found in animal products where they are
produced by bacteria in the gut of ruminant animals (eg:
cow, goat, sheep)
•Therefore some trans fatty acids are present in meat, milk
and other dairy products.
•These are mostly C18 monounsaturated fatty acid (vaccenic
acid).
• Daily intake of 5g trans fat increases the risk of heart
disease by 25%
,
, How are trans fats made
artificially?
Trans fats are made through the chemical process called
hydrogenation of vegetable oils. Hydrogenation
solidifies liquid oils and increases the shelf life and the
flavour stability of oils and foods that contain them.
Sun flower oil Margarine
Hydrogenation of fats and oils:
Hydrogenation is the process of converting liquid oil to
solid fat by adding hydrogen to some of the double bond
of the unsaturated carbon chain in presence of nickel as
catalyst; e.g., Margarine .
, Trans fat
•Unsaturated fat with trans-isomer fatty acid.
•Not essential fatty acids
•Naturally found in animal products where they are
produced by bacteria in the gut of ruminant animals (eg:
cow, goat, sheep)
•Therefore some trans fatty acids are present in meat, milk
and other dairy products.
•These are mostly C18 monounsaturated fatty acid (vaccenic
acid).
• Daily intake of 5g trans fat increases the risk of heart
disease by 25%
,
, How are trans fats made
artificially?
Trans fats are made through the chemical process called
hydrogenation of vegetable oils. Hydrogenation
solidifies liquid oils and increases the shelf life and the
flavour stability of oils and foods that contain them.
Sun flower oil Margarine
