Why is glucose called the source of life and fructose called the health killer?

Glucose is called this name because there is glucose in grapes. But in fact, glucose is the most widely distributed and important monosaccharide in nature, and it is also found in other fruits. It is called glucose only because it was originally extracted from grapes.

Glucose is an indispensable substance in life activities, which can directly participate in the metabolic process in the human body. In the digestive tract, glucose is more easily absorbed than any other monosaccharide, and can be directly used by human tissues after absorption. Oligosaccharides (such as sucrose) and polysaccharides (such as starch) ingested by human body must also be converted into glucose to be absorbed and utilized by human tissues.

Fructose is a monosaccharide, which mainly exists in fruits, honey and other foods in nature, and also exists in plants, especially compositae plants. Among all kinds of natural sugars, fructose has the highest sweetness, which is about 1.8 times that of sucrose. Therefore, fructose is considered as the safest sweetener in food production and processing, because fructose comes from food; Because fructose metabolism does not depend on insulin, it directly enters the human intestine and is digested and utilized by the human body. Therefore, fructose is called "healthy sugar" because its glycemic index is much lower than that of traditional sugar.