Sources and foods Classification of lipids containing lipids
- Slides: 8
Sources and foods Classification of lipids: containing lipids Lipids are classified to 3 classes �Simple lipids, such as oils, fats and waxes. � Compound lipids such as, phospholipid, sulpholipids, glycolipids and aminolipids. �Derived lipids as all compound analyzed from simple lipids or from compound lipids.
�When 1 gram of lipids digestion outside the body gives 9. 3 K. calories, while, when it digestion inside the human body 1 gram protein gives 9. 0 K. calories. 50 gram lipids when digestion: �Using bomb colorimeter or oxygen’s colorimeter “outside the body” – on nutritional laboratory gives…. 50 × 9. 3 = 465 K. calories When digestion of lipids “inside the body” gives…. 50 × 9 = 450 K. Calories. �
Natural lipids as animals fats are more save to body healthy. On opposite, manufacture oils and fats are dangerous for persons. They cause increase in low density lipoprotein “LDL” and decrease in high density lipoprotein “HDL”, which are caused many diseases as cardiovascular disease, heart disease ……etc.
Fats occur widely both in animals and plants. Fats are another type of nutrients after carbohydrates that provide energy. Fats are solid at room temperature and oils are liquid at room temperature. Visible lipids include butter, margarine, vegetable oils, fat layers around and within lean meat …. etc. there are fats cannot be seen “invisible lipids or latent lipids” such as fats within meat, whole milk products, ice cream , cheese, eggs yolks. . etc
The function of lipids �They serve as concentrated sources of heat and energy for the body. They provide more energy “K. calories” per unit than any other nutrient “lipids gives 2. 25 times energy more than proteins or carbohydrates when digestion inside the human body”. �They are necessary to absorb certain fat soluble vitamins “vitamins A, D, E and K”.
The function of lipids �They contribute to the flavor, aroma, and palatability of food. � They are source of essential fatty acids “EFA” which are unessential fatty acids “UEFA” such as linoleic acid, linolenic acid and arachidonic acid, they are very important for body healthy. There are many another functions of lipids for human body.
