NOT DONE - NUTR250 - CH5

kcal/g in Lipids

9

Lipid’s Roles in Body

Energy Fuel, Energy Stores, Emergency Reserve, Cushioning & Insulation, Cell membrane Material, Raw Materials

Lipid’s Role in Food

Nutrients, Transport, Concentrated Energy Source, Sensory Appeal, Fat Simulates Appetite, Satiety

3 Classes of Lipids

Triglycerides, phospholipids, sterols

Triglycerides

• most abundant lipid in diet

• storage form in body

• 95% of lipids in our diet

Phospholipids

• manufactured by liver

• found in many foods

• primary lipid in cell membrane

What is the primary dietary sterol?

Cholestoral

Sterols

• structure similar to cholesterol