Glucose is a simple sugar or monosaccharide. It's your body's preferred carb-based energy source ( 1 ). Monosaccharides are made up of one single unit of sugar and thus cannot be broken down into simpler compounds. They're the building blocks of carbohydrates.

Does glucose have sugar?

So what is glucose, exactly? It's the simplest of the carbohydrates, making it a monosaccharide. This means it has one sugar.

Is glucose different from sugar?

Sugar vs. glucose. There are different kinds of sugars, but the type the body uses most is glucose. Other sugars, like fructose from fruit or lactose from milk, are converted into glucose and used for energy.