Fructose is a fuel primarily involved in energy storage as fat and glycogen rather than energy production, and it triggers bodily changes that favor energy storage.

“the second type of sugar is fructose and the best way to think of fructose is it is a fuel first off it's present in fruit but it turns out to be the sugar that is involved in energy storage rather than energy production and so when you eat glucose you use that to produce energy but when you eat fructose it will actually trigger changes in the body that will favor the storage of energy and this is the sugar that animals use to store energy so and you store it in the way of fat in the way of glycogen and all those kinds of anything that will facilitate storing energy is done by fructose”