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TAMI1691's Photo TAMI1691 Posts: 4,429
9/6/09 5:10 P

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The percentage of fat in a food is NOT the same as the percentage of kilojoules/calories.

Food that appears to have a low fat percentage can
still have a high percent of the energy coming from fat.

eg whole milk is less than 4%fat yet....If you convert this to calories it turns out to be 51%fat from calories.

you can do this easily with any foods.

1 gram of fat = 9 calories

so the equation per serve is

grams of fat per serve x 9 divided by the total calories per serve. then times by 100 to get the %

eg whole milk. one cup 250ml

9.5g x 9 equals 85.5

divide by total cals 167

times by 100 equals 51% therefore
51% of the energy in this food comes from fat.


2% milk had 36%
1% milk has 20%
and no fat milk is 0%

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