Trans fats have been banned more and more. Since then more attention is asked
for lowering the saturated fat intake; below 10en% of the total diet.
Taking out the trans fats was already difficult, but to lower the saturated
fatty acids in foods will be the newest challenge for food manufacturers. It
should be realized that an appropriate fat will usually be a mixture of fat
component(s) and liquid oil.
If a hard fat in a certain application is necessary trisaturated or disaturated-monounsaturated triglycerides are required; actually
triglycerides of the type H3, H2M and H2U should be present. The saturated fat
in the form of HU2 is less effective and functional; so should be abandoned as
much as possible.
As fat modification tools can be applied: fractionation, interesterification and
possibly total hydrogenation.
Saturated fatty acids in triglycerides are required to obtain a certain level
of solids and so hardness. So the saturated fatty acids, present in a fat or a
fat blend should be used as effective as possible.
An effectivity factor for the saturated part to the solids level at 20°C (N20)
in a hard fat (component) can be calculated. But steepness of a fat should also
be defined. N20 of a fat component should be preferably high but N35 should be
as low as possible in most applications.
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