How does the Glycemic Index Work?
When we consume carbohydrates, both simple and complex, the body converts them to Glucose. This is absorbed into the blood stream and raises our Blood Sugar Level (BSL). The Pancreas releases the hormone Insulin that converts the glucose into Glycogen which is stored in the Liver. Insulin tries to level out the BSL and keeps converting glucose into glycogen until the BSL returns to normal. The liver can only store so much and once full, excess glycogen is then metabolised and stored as fat. The effect that food has on your BSL is it’s Glycemic Index. Glucose was given the value 100 and everything else is measured around it.
So what about Protein and Fat I hear you ask?
Protein is converted into amino acids to be used in building new proteins that our bodies need. Of course, excess consumption of proteins will eventually be stored as fat but this is far more likely to happen if you have consumed carbs that have made your BSL rise dramatically.
Fat is broken down into fatty acids, which can travel in the blood and be captured by our fuel hungry cells. As with protein, if your BSL is high all excess calories are stored. Fat can only be stored in the presence of insulin.