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What Is the Number of Calories Per Gram of Dextrose?

author image Claire Lunardoni
Claire Lunardoni has written for LIVESTRONG.COM and eHow since 2009. She is an American College of Sports Medicine-certified personal trainer and a fitness instructor who trains endurance athletes for IntEnd: Integrated Endurance in San Francisco. She holds a Bachelor of Arts in language studies from University of California in Santa Cruz.
What Is the Number of Calories Per Gram of Dextrose?
Dextrose is a kind of sugar. Photo Credit: Riley Maclean/Hemera/Getty Images

Dextrose is a sugar that comes from corn. Dextrose is less sweet than cane sugar and contains about 4 calories per gram.

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A gram of dextrose is approximately 1/3 of a teaspoon.


One gram of dextrose contains exactly 1 g of carbohydrate. There is no protein or fat in dextrose.


Dextrose is a simple sugar, or monosaccharide, meaning that it has only one sugar molecule. Since there are no chemical bonds to break during digestion, your body absorbs it almost instantaneously.


Diabetics take dextrose when their glucose levels are low.
Diabetics take dextrose when their glucose levels are low. Photo Credit: verve231/iStock/Getty Images

Because it is such a quick source of energy, dextrose is an ingredient in some diabetic medications. Endurance athletes also use dextrose during long workouts to provide their muscles with a quick carbohydrate supply to preserve the energy stored in their muscles.

Glycemic Index

Dextrose is a very high-glycemic-index food, meaning that the sudden sugar rush in your bloodstream causes your body to release more insulin. Frequent consumption of high-glycemic-index foods and the resulting insulin surge can lead to insulin resistance and become detrimental to your long-term health.

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