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Related Concept Videos

Introduction to Carbohydrates01:34

Introduction to Carbohydrates

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Carbohydrates, proteins, and fats are the primary macronutrients in the human diet. However, carbohydrates are the most favored source of energy in the body. They can be found in a wide variety of foods, including whole grains, fruit, and vegetables, in various forms, such as sugars, starch, and dietary fiber. Based on their structure, carbohydrates are classified into three main classes— monosaccharides, disaccharides, and polysaccharides. The body's cells can only utilize simple...
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Carbohydrate Digestion00:57

Carbohydrate Digestion

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Carbohydrate digestion and metabolism break down simple and complex carbohydrates from food into saccharides (i.e., sugars) for the body to use as energy. Carbohydrate digestion starts in the mouth during mastication, or chewing. The masticated carbohydrates remain intact in the stomach. Digestion resumes in the duodenum of the small intestine, where pancreatic alpha-amylase and brush border enzymes of the microvilli convert complex carbohydrates to monosaccharides. Finally, the monosaccharides...
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Sugars as Energy Storage Molecules01:10

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Sugar (a simple carbohydrate) metabolism (chemical reactions) is a classic example of the many cellular processes that use and produce energy. Living things consume sugar as a major energy source because sugar molecules have considerable energy stored within their bonds. Consumed carbohydrates have their origins in photosynthesizing organisms like plants. During photosynthesis, plants use the energy of sunlight to convert carbon dioxide gas into sugar molecules, like glucose. Because this...
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Carbohydrate Metabolism01:36

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Carbohydrates are polymers composed of molecules containing atoms of carbon, hydrogen and oxygen. One gram of carbohydrate can provide four kilo-calories of energy, which makes it the most efficient instant energy source.
Starch accounts for approximately 60% of the carbohydrates consumed by humans. Since amylase enzymes cannot function in the stomach's acidic environment, starch can only be digested in the mouth and small intestine. Simple sugars are found naturally in milk and fruits in...
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Carbohydrate Absorption01:25

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Carbohydrates are essential macronutrients that serve as the body's primary energy source. Their digestion begins in the mouth, where salivary amylase partially breaks down complex carbohydrates such as starch into smaller oligosaccharides. This mechanical and enzymatic activity prepares carbohydrates for further processing in the gastrointestinal tract.
After being swallowed, the partially digested carbohydrates mix with gastric secretions in the stomach. However, the acidic environment...
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Oral Hypoglycemic Agents: α-Glucosidase Inhibitors01:19

Oral Hypoglycemic Agents: α-Glucosidase Inhibitors

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α-glucosidase inhibitors, including acarbose (Precose), miglitol (Glyset), and voglibose (Voglib) (primarily available in Asia), are drugs that control blood sugar levels by delaying the digestion of starch and disaccharides. They achieve this by inhibiting α-glucosidase enzymes in the intestine, which slow the absorption of carbohydrates in the intestine, which in turn leads to a prolonged release of the glucoregulatory hormone GLP-1 from intestinal L-cells.
Acarbose and miglitol are...
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Updated: Sep 11, 2025

Transverse Sectioning of Mature Rice Oryza sativa L. Kernels for Scanning Electron Microscopy Imaging Using Pipette Tips as Immobilization Support
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Enzymatically modified starch: Structure, digestibility, energy supply, and applications.

Yali Huang1, Lingjin Li2, Yan Hong2

  • 1School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China.

Carbohydrate Polymers
|August 16, 2025
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Summary

Enzymatically modified starch offers tailored energy release and nutritional benefits. This review explores how enzymes alter starch digestion for applications like sports supplements and medical foods.

Keywords:
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Area of Science:

  • Biochemistry and Food Science
  • Carbohydrate Chemistry
  • Nutritional Science

Background:

  • Enzymatic modification of starch is a versatile method to enhance its properties and applications.
  • Starch digestion rate significantly impacts energy absorption and acquisition.
  • Current research lacks comprehensive reviews on enzymatic starch digestion for energy provision.

Purpose of the Study:

  • To review enzymatic techniques for starch digestion and energy supply.
  • To discuss how starch granule characteristics influence enzymatic digestion.
  • To explore the link between starch digestion and nutritional functions.

Main Methods:

  • Review of literature on enzymatic modification of starch granules.
  • Analysis of enzyme catalytic sites on starch.
  • Discussion of starch granule morphology, molecular composition, and crystal structure effects on digestion.

Main Results:

  • Enzymatic strategies alter starch molecular structure, conferring novel digestive properties.
  • Starch digestion is associated with glucose homeostasis, energy supplementation, and intestinal health.
  • Enzymatically digested starch shows promise in sports nutrition and medical foods.

Conclusions:

  • Enzymatically modified starch can be tailored to meet specific energy needs.
  • Optimizing in vitro digestion technology is key for developing advanced carbohydrate products.
  • Further research can enhance the development of high-quality nutritious carbohydrate products.