LIPID (FAT) NOTES
Lipids
Waxy
or oily compounds that
store energy in their bonds
Elements in lipids – carbon,
hydrogen & oxygen
Examples – fats, oils &
waxes
Functions in the body
 Long-term
energy
storage
 Insulation
 Forms the protective
membrane that
surrounds each cell
 Some used as
chemical messengers
Types of Lipids
– fats that hold all the
hydrogen that molecule can hold
 Examples: shortening & butter
 Saturated
H
H
H
H–C–C–C–O–H
H
H
H
Types of Lipids, cont.
– fats that have some
spaces left in the molecule for
hydrogen
 Examples: oils
 Unsaturated
H
C=C=C–O–H
H
H
Building Blocks
 Fatty
acids
– the
building
blocks of
fats (lipids)
Food Energy
1
gram of
lipids (fat) is
9 calories
Healthy Living Fact:
•Your body needs some fat.
•Read the nutrition labels &
choose unsaturated fats instead of
saturated or trans fats