Health Effects Lipoproteins combination of lipids, phospholipids and proteins which form a – hydrophobic centre with hydrophilic portions pointing outwards, thus allowing lipids to be transported in blood Low-density lipoproteins (LDLs) Consist mainly of cholesterol Transport cholesterol to cells throughout the body High levels can lead to fatty deposits in walls of arteries and atherosclerosis, can lead to heart attack and stroke High-density lipoproteins (HDLs) Protein-rich Smaller and denser than LDLs (HDL 33% protein; LDL 25% protein) – – Remove cholesterol from tissues and arteries and return it to the liver where it is converted to bile acids Saturated and trans-fats increase LDL levels (and trans-fats have been found to decrease HDL) Polyunsaturated and monounsaturated fats have been found to decrease LDL and increase HDL
Health Effects Lipoproteins – combination of lipids, phospholipids and proteins which form a hydrophobic centre with hydrophilic portions pointing outwards, thus allowing lipids to be transported in blood Low-density lipoproteins (LDLs) Consist mainly of cholesterol Transport cholesterol to cells throughout the body High levels can lead to fatty deposits in walls of arteries and atherosclerosis, can lead to heart attack and stroke High-density lipoproteins (HDLs) Protein-rich Smaller and denser than LDLs (HDL – 33% protein; LDL – 25% protein) Remove cholesterol from tissues and arteries and return it to the liver where it is converted to bile acids Saturated and trans-fats increase LDL levels (and trans-fats have been found to decrease HDL) Polyunsaturated and monounsaturated fats have been found to decrease LDL and increase HDL
notes_-_b.3_lipids.docx