fats Flashcards
what are the functions of fat in the body? (6)
1)Provides the fat soluble vitamins
2)Keeps body warm
3) Protects vital organs
4) Make all body cells
5) Provides the essential fatty acids
6)Concentrated source of energy 1 g = 9 kcal
Difference between fats and oils?
fats=usually solid at room temperature
oils=usually liquid at room temperature
(functions in body are pretty much the same)
functions in food?
Improve:
-flavour
-Texture
-smell
Makes food easier to swallow
Takes longer to digest and slows stomach from emptying.
visible sources of fat?
-Fat layers on meat
-White marbling inside meat
-Butter on bread
Invisible sources of fat?
-crisps,biscuits,cakes
-fat droplets in emulsions
sources of fat (animal fat)
.Butter
.Meat
.Oily fish
.Hard cheese
.Eggs
.chocolate
sources of fat (vegetable fat)
.Vegetable and plant oils
.Avocados
.Nuts
.Seeds
.Fat spreads
What is hydrogenation?
Process when vegetable oils are ‘hardened’ to make them solid at room temperature.
hydrogenation facts? (3)
.Contain trans fats.
.Thought to cause heart problems
.Food manufacturers should be reducing
What is the chemical name for fats?
Triglycerides
Its a molecule made of?
- 3 fatty acids
- 1 glycerol
The molecule can be either saturated or unsaturated.
Health (saturated fat)
.Linked to heart disease
.Foods contain cholesterol
.Leads to fatty deposits
.Most people in the Uk eat too much
Health (unsaturated fat)
.Healthier than saturated
.Lower blood cholesterol
.Reduce risk of heart disease
Monounsaturated
one double bond
-avocados
-cashew nuts
-peanuts
polyunsaturated
two or more double bonds
-corn
-soya
-sunflower oils