Along with sterol, phospholipids make up 5% of lipids in diet Best know phospholipids is lecithin Has backbone of glycerol 2 of it 3 attachments occupied by fatty acid like those of triglycerides The third space occupied by a phospholipids group and a molecule of choline Soluble in both fats and water Fatty acids make phospholipids soluble in fat Phosphate group allow phospholipids to dissolve in water and this allows the phospholipids used as an Emulsifier to mix with water in products such as mayo and candy. Phospholipids are found naturally in foods The richest sources of lecithin are in: Eggs Liver Soybeans Wheat germ Peanuts
ACTION OF PHOSPHOLIPIDS:
Lecithin’s decrease other phospholipids are important composition of cell membranes Helps lipids move across cell membranes because soluble in both water and fats such as Vitamins Hormones Act as an emulsifiers keeping fat suspended in the blood and body fluids Do not need to take supplement of lecithin because the liver makes lecithin from scratch Large doses of lecithin can cause GI distress, sweating and loss of appetite
Phospholipids, including lecithin, have a unique chemical structure that allows them to be soluble in both water and fat. In the body, phospholipids are part of cell membranes; the food industry uses phospholipids as emulsifiers to mix fats with water. A cell membrane is made of phospholipids assemble into an orderly formation called a bilayer. The fatty acid tails orient themselves away from the watery fluid inside and outside of the cell. The glycerol and phosphate heads are attracted to the watery fluid.
STEROLS
Most common sterol is cholesterol. Cholesterol is made in the body and comes from foods. Derived from both plants and animal contain sterols, animals contain significant amounts of cholesterol. Cholesterol is in dietary foods and blood. The good and bad cholesterol is found in blood only. The