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Definition, Classification, Functions, Food Sources | Nutrition - Lipids/Fats - Macronutrients | 11th Home Science : Chapter 5 : Nutrition

Chapter: 11th Home Science : Chapter 5 : Nutrition

Lipids/Fats - Macronutrients

Lipids are organic sub-stances soluble in fat solvents such as alcohol, ether, and chloroform but not in water.

Lipids/Fats

 

Definition: Lipids are organic sub-stances soluble in fat solvents such as alcohol, ether, and chloroform but not in water. The term includes fatty acids, soaps, neutral fats, phospholipids, ste-roids and waxes. Oils found in seeds, butter from milk, and lard from meat, are examples of fats found in foods.

 

Classification: Lipids are classified as follows




Functions: The functions of lipids are to

 

·        Provide energy reserve and supply 9 kcal/gram.

 

·        Serve as a vehicle for the absorp-tion of fat-soluble vitamins A, D, E, and K

 

·        Supply essential fatty acids neces-sary for growth and function


·        Provide energy source so that pro-teins are spared for tissue growth and repair

 

·        Gives satiety

 

·        Act as insulators against heat and cold.

 

Food Sources: Visible fat sources are But-ter, Ghee and Oil, Invisible fat sources are Cereals, Pulses, Oil seeds, Milk and Egg.







 

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11th Home Science : Chapter 5 : Nutrition : Lipids/Fats - Macronutrients | Definition, Classification, Functions, Food Sources | Nutrition


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