Diabetes is a disease of metabolism, which is the way your body uses food for energy and growth.1 In particular, it's related to one of the food nutrients that supply energy, called carbohydrates.2 Normally, your stomach and intestines digest the carbohydrates in your food into a sugar called glucose. Glucose is your body's main source of energy. After digestion, the glucose moves into your blood to give your body energy.
To get the glucose out of your blood and into the cells of your body, your pancreas makes a hormone called insulin. If you have diabetes, either your body doesn't make enough insulin, or your cells can't use it the way they should. Instead, the glucose builds up in your blood, causing diabetes, otherwise known as high blood sugar.
Diabetes is generally divided into three categories:
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