
Originally Posted by
OneEyedJohnny
Ok looked in one of my old books. It appears that insulin increases lipoprotein lipases (enzymes that assist in fat storage). Your body absorbs triglycerides, fatty acids, sterols (cholesterols), and fat soluble vitamins into the intestinal cell and makes a transport vehicle called a chylomicron which is basically a M&M with fat inside, the coating being protein ... note that larger fat molecules must be broken into glycerol and fatty acids to be able to penetrate the cell membrane, any cell membrane in fact, they are reassembled as needed to synthesize large lipids the cell needs once inside the cell. Anything that is not used may be used in other cell processes (ie burned or turned into other things inside the liver or other cells) or stored in your fat cells. These chylomicrons are carried through the lymphatic system into the blood stream, unlike carbs and aminos which absorb directly into intestinal capillaries. Once in the bloodstream the protein coating disintegrates in about 8 minutes, releasing the lipids. The fats are now available for use in the cells, and since you consumed more than just fat (carbs and proteins) your body releases insulin which stimulates the release of lipoprotein lipase from vessel walls, fat cells, muscle cells, and heart muscle. This lipase allows excess fats to be stored within the fat cell. Also excess carbs and aminos CAN be stored within the fat cell, but is less likely. 100 fat calories (11 grams of fat) take the expenditure of only 2.5 calories to store, while 100 extra calories of glucose (25 grams of glucose) takes the expenditure of around 23 calories, so you are more likely to store the fat in the presence of insulin, not CONVERT the carbs into fat within the fat cell. This is why it is best to avoid fats PWO while the insulin is active.