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education/nutrition/Lipids.md

@@ -67,7 +67,7 @@ A lipid that has three fatty acids attached to a three-carbon compound called gl
 - **Glycerol** is a three carbon alcohol that forms the backbone of fatty acids
 - 
 # Phospholipids
-A phospholipid is a type of lipid needed for the flexibility, structure, and makeup of the cell membranes and for proper functioning of the never cells.
+A phospholipid is a type of lipid needed for the flexibility, structure, and makeup of the cell membranes and for proper functioning of nerve cells.
 - Partially water soluble
 	- Hydrophilic
 		- Part that attracts water
@@ -86,8 +86,32 @@ Sterols are lipids that have a more chemically complex structure than a triglyce
 	- Poultry
 	- Dairy products
 
+| Cholesterol (mg/dl)         | Classification             |
+| --------------------------- | -------------------------- |
+| <200                        | Desireable                 |
+| 200-239                     | Borderline high            |
+| >= 240                      | High                       |
+| **LDL Cholesterol (mg/dl)** | **Classification**         |
+| < 100                       | Optimal                    |
+| 100 - 129                   | Near optimal/above optimal |
+| 130-159                     | Borderline high            |
+| 160-189                     | High                       |
+| >= 190                      | Very high                  |
+| **HDL Cholesterol (mg/dl)** | **Triglycerides (mg/dl)**  |
+| < 150                       | Normal                     |
+| 150-199                     | Borderline high            |
+| >= 200                      | High                       |
+
 # Lipases
 Lipases are enzymes that break down lipids
 - **Cholecystokinin** is a hormone that stimulates the gallbladder to release bile and the pancreas to secrete digestive juices
 	- Bile helps with the emulsification of and digestion of fat. 
 - Secretin is a hormone that stimulates the liver to produce bile and the pancreas to secrete bicarbonate rich pancreatic juice
+
+# Lipoproteins
+Lipoproteins are water-soluble structures that transport lipids through the bloodstream. Lipoproteins are needed because fat is hydrophobic.
+- Chylomicron mostly carries triglycerides
+- High density lipoprotein (HDL) carries the most protein (45-50%), and roughly 30% phospholipids. HDL carries lipids away from tissues and to the liver, where they can be processed and eliminated. It's considered "good" cholesterol
+- Low density lipoprotein (LDL) carries the most cholesterol, and it carries lipids from the liver out to other tissues in the body. It's considered "bad" cholesterol
+- Very low density lipoprotein (VLDL) carries triglycerides from the liver into the bloodstream, where cells that line capillaries break down the triglycerides into fatty acids and glycerol
+- Oxidized LDL is formed when chemically unstable substances damage LDL, transports cholesterol into the arterial lining