1. LIPIDS
FATS, OILS & WAXES

2. Fat

3. Oils

4. Wax

5. Building Blocks - glycerol and 3 fatty acids
Contain ONLY C, H, & O
(just like carbs)
(They have more carbon than carbs do)
Building Blocks - glycerol and 3 fatty acids
Fatty acid “tails”

6. 1 glycerol with 3 fatty acid “tails”

7. 3 groups of lipids Fats Oils Waxes Characteristic:
None dissolve in water
They are stored in your body without water—that’s much more energy-efficient than carb or protein storage
Huge Energy

8. Check your Understanding
What is the scientific name for “fats”?
What are fats made of?
What one characteristic puts the lipids all in the same group?
What are the 3 types of lipids?

9. 2 types: saturated and unsaturated
Saturated is BAD (bacon)
unsaturated is GOOD (olive oil)

10. Saturated Fats Made by animals Solid at room temperature
Ex - Butter, Bacon
Cause your body to make more “bad” cholesterol –
blood cholesterol levels rise
BAD cholesterol = LDL
LDL plugs up arteries

12. Unsaturated Fats (oils)
Made by plants
Also made by fish
Liquids at room temperature
Ex - Olive oil
Cause your body to start making more “good” cholesterol – blood cholesterol levels drop
“Good” cholesterol = HDL
HDLs clean cholesterol from your blood
(liver breaks cholesterol down)

13. Functions of Fats (4) 1. Long term energy storage
Store 9 calories per gram
Are hydrophobic so they are not stored with water
6 times the energy of carbs and protein
2. Forms cell membranes
3. Cushions organs
4. Insulation

14. Check Your Understanding
What is the good fat?
What is the bad fat?
What is the good cholesterol?
Bad cholesterol?
Which organisms make saturated fats?
Which organisms make unsaturated fats?
Name the 4 functions of fats
How many calories per gram of fat?

15. If saturated fats are so bad for us, why do restaurants tend to use this type of fat?
If fats are so bad for us, then why do we like them so much?