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Unformatted text preview: s the difference?
! Fats are (semi)-solids at room temperature
Oils are liquid at room temperature Normal hydrolysis of triglycerides breaking off
the fatty acids (blue) by lipase (orange)
FST10 ©GMS/GFR 2012 Percentages of Fat —
The Games People Play
! ! For example; “95% Fat Free” means 5% fat Nutritionists recommend <30% (+/-) by Calories
! ! Lift pencils for a moment . . . Food industry labels fat% by weight
and they like to tell you how fat isn!t there
! FST10 ©GMS/GFR 2012 And they think "calories! for diets These 2 numbers can be very different FST10 ©GMS/GFR 2012 Fat Content - Example 1 Fat Content - Example 1 Calculate % calories from fat We’ll use this to examine fat content
! 100 grams of food (no water — dry food)
! 70 grams of CHO!s and protein
Could be labeled 70% "fat free! (30% fat)
Since the labeling refers to % by weight 100 grams of food (no water, just dry food)
! 30 g of from fat
! 70 g of CHOs and protein
! So, remember it!s 30% fat by weight ! Calculate calories:
! 30 x 9#
! 70 x 4#
otal kcal# 30 grams of fat ! ! !
! ! = 270 kcal (fat)
= 280 kcal (CHO!s & protein)
= 550 kcal % fat by calories = 270/550 x 100 = 49% (almost half) FST10 ©GMS/GFR 2012 FST10 ©GMS/GFR 2012 Fat Content - Example 2
! What would happen if we added 5 times the amount of water?
! ! 70 grams of CHO!s and protein ! ! 30 grams of fat ! Fat Content - Example 2 500 grams of water for a total of 600 g of food Calculate the calories:
! The % fat by weight is now 30/600 x 100 = 5% !
! Could be labeled "95% fat free! (5% fat)
! 30 x 9# #
70 x 4# #
500 x 0# #
# The % fat by weight now = 30/600*100 = 5%
% fat by calories
= 270/550 x 100 = 49% Bottom line:
! It!s now “95% fat free”
! But the % calories from fat is the same (almost half) FST10 ©GMS/GFR 2012 More bottom line ...
! ! By diluting a food with water, the % fat
# (by weight) will go down
However, just diluting with water does not
change the % of calories from fat = 270 kcal
= 280 kcal
= 000 kcal
= 550 kcal FST10 ©GMS/GFR 2012 An example of ‘low fat’ franks
! 3% fat (by weight)
20% of calories from
fat (all other things being equal) FST10 ©GMS/GFR 2012 FST10 ©GMS/GFR 2012 Another example ... With high water content ... FST10 ©GMS/GFR 2012 For Low-Fat types For Low-Fat types
! Simplesse™ (made by NutriSweet & CP-Kelco)
! However, “up to 1% fat”
is OK made from dairy & egg proteins ! can be formulated as a powder ! may have problems with heating ! 1 calorie vs. 9 calories FST10 ©GMS/GFR 2012 For Low-Fat types
! Olestra (Olean™ — Proctor & Gamble) Olestra — Controversial
Get the facts about Olean brand olestra, the no-fat cooking oil
with the full-fat flavor! Here you'll find the specific information
you're looking for about olestra and your favorite snacks. Just
click on the topic you would like to know about or type a word or
phrase in the search box. The Olean and Healthy Snacking segment airing on Chemically bonds fat...
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- Spring '08