How does sugar get into the blood?
All food that is digested and then absorbed travels through the bloodstream to the liver. Here it is processed further – some is broken down into simpler compounds, some is stored and others may be converted or even excreted. However, the body retains almost all of the macronutrients – carbohydrates, proteins and fats – in some form or the other. The cells in the body need a constant supply of nutrients to produce energy. This is mainly in the form of glucose, a type of simple sugar.
Carbohydrates are the main source of energy in that it is broken down into simple sugars like glucose and then transported via the bloodstream to all the cells of the body for energy production. When carbohydrates are in short supply, the body will use proteins or fats which can also be converted into glucose. Sugar in the blood is therefore derived from :
- nutrients absorbed from the gut and on its way to the liver
- food broken down by the liver and glucose released to the body’s cells
- conversion of fats or protein into glucose for energy production when carbohydrates are in short supply