Sucrose

What Is Sucrose?

Sucrose is a disaccharide composed of one glucose molecule and one fructose molecule bonded together. It is the scientific name for common table sugar and is one of the most widely consumed sweeteners in the world. Sucrose is extracted primarily from sugar cane and sugar beets through an industrial refining process.

It has a glycemic index of approximately 65, lower than pure glucose, because it must first be broken down by the enzyme sucrase in the small intestine before the component monosaccharides can be absorbed.

Digestion and Energy

When sucrose is ingested, the digestive enzyme sucrase-isomaltase cleaves the bond between glucose and fructose. The resulting monosaccharides are then absorbed through the intestinal wall into the bloodstream. Glucose proceeds directly into circulation and stimulates insulin release, while fructose is transported to the liver for processing.

Sucrose provides 4 kilocalories per gram, the same caloric density as all carbohydrates. It contains no significant vitamins, minerals, or fiber — it is a source of pure energy.

Sucrose in Food and Health

Sucrose is ubiquitous in processed foods, baked goods, confectionery, and beverages. It is also naturally present in some fruits and vegetables, though at much lower concentrations than in refined products.

Excessive sucrose consumption is associated with dental caries, weight gain, elevated triglycerides, and increased risk of metabolic syndrome. Most international health guidelines recommend limiting added sugar intake, with the World Health Organization advising less than 10% of total energy intake from free sugars.