Roles and impacts of lipids in foods

CharacteristicRole
ChemicalPotential source of rancidity and off-flavours due to oxidation
PhysicalStructure
Bulk
By interacting with other molecules, additional structural elements (e.g., complexing with carbohydrates)
Carrier (with release control) of dissolved moieties (e.g., vitamins, colour, sweetness, flavour, and aroma)
Coatings
Emulsions (oil in water and water in oil)
Cooking matrix (frying etc.)
Responsive to thermal environment
SensorialMouthfeel
Flavour
Encourage food consumption (perhaps excess)
PhysiologicalEssential fatty acids critical for human tissues
Plant oils contain vitamin E
Satiety
Energy
Animal fats associated with cholesterol content and impact on cardiovascular disease
Contributes to obesity in excess