Crystalline fructose is often used as a natural sweetener for foods and beverages. It is a basic sugar that is almost entirely made up of pure fructose.The trace elements of fructose are water and sometimes minerals.

Crystalline fructose is commonly used in juices, yogurts, nutrition and energy supplement drinks, and other products as an alternative to sucrose. Crystalline fructose is derived from corn starch.

Processed corn starch naturally yields high concentrations of glucose.

If the glucose is prompted to undergo an enzymatic reaction, it is changed into fructose. Once the yield crystallizes, it becomes crystalline fructose. This is often consumed as an ingredient in a variety of food.