Polyunsaturated Oils
POLYUNSATURATED OIL
In normal modern food processing, oils and fats are
typically superheated; this transforms even
polyunsaturates into trans-polyunsaturates, a
trans-fatty acid. Any fat or oil that's
been heated or exposed to air or light will contain some
trans-fatty acids.
Perhaps surprisingly, butter is good for you, and more
natural. Though it contains a certain level of
cholesterol, its lack of essential fatty acids means
that when you fry with butter, you don't get the
trans-fatty acids. This is not true for most other oils
and fats. When frying with small amounts of oil, butter
is a better choice.
For the true trans-fatty acid content of your foods, add
together polyunsaturated fats, monounsaturated fats, and
saturated fats as listed on the product label. Then
subtract that number from the total fat listed. The
difference between your total and the total fat is equal
to the trans-fatty acid content in that product.
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