Fructose is a type of sugar known as a monosaccharide.
Like other sugars, fructose provides four calories per gram.
Fructose is also known as “fruit sugar” because it primarily occurs naturally in many fruits. It also occurs naturally in other plant foods such as honey, sugar beets, sugar cane and vegetables.
Fructose is the sweetest naturally occurring carbohydrate and is 1.2–1.8 times sweeter than sucrose (table sugar).
