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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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What are Carbohydrates?01:44

What are Carbohydrates?

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Overview
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Chemistry of Carbohydrates03:25

Chemistry of Carbohydrates

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Carbohydrates are an essential part of the diet in humans and animals. Grains, fruits, and vegetables are natural sources of carbohydrates that provide energy to the body, particularly through glucose, a simple sugar that is a component of starch and an ingredient in many staple foods. The stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule represents carbohydrates. In other words, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules. This...
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Chemistry of Carbohydrates03:25

Chemistry of Carbohydrates

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Carbohydrates: Dietary Sources and Requirements01:15

Carbohydrates: Dietary Sources and Requirements

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Carbohydrates are predominantly obtained from plant sources. With the exception of lactose found in milk and insignificant glycogen amounts in meat, most consumed carbohydrates have plant origins. Monosaccharides and disaccharides, or sugars, can be sourced from fruits, honey, milk, sugar cane, and sugar beets. Grains and vegetables are rich in the polysaccharide starch. Two types of polysaccharides provide fiber: cellulose, which is abundant in many vegetables, forms undigestible roughage or...
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Updated: Nov 9, 2025

Comprehensive Compositional Analysis of Plant Cell Walls Lignocellulosic biomass Part II: Carbohydrates
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Carbohydrates: Separating fact from fiction.

Ellen E Blaak1, Gabriele Riccardi2, Leslie Cho3

  • 1Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, the Netherlands.

Atherosclerosis
|April 9, 2021
PubMed
Summary
This summary is machine-generated.

Dietary fiber and whole grains benefit metabolic health, while refined carbohydrates and sugars harm it. The type of carbohydrate consumed significantly impacts mortality and cardiovascular events, emphasizing increased fiber intake.

Keywords:
CarbohydrateCardiovascular outcomeDiabetesFiberGut microbiomeInflammationInsulin resistanceLipidMortalityRefined carbohydrateWeightWhole grain

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An Efficient Sample Preparation Method to Enhance Carbohydrate Ion Signals in Matrix-assisted Laser Desorption/Ionization Mass Spectrometry
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Area of Science:

  • Nutrition Science
  • Cardiovascular Health
  • Metabolic Health

Background:

  • The role of carbohydrates in a healthy diet remains debated due to limitations in dietary recall studies and the inability to differentiate carbohydrate types.
  • Confusion persists regarding the impact of different carbohydrate sources on overall health outcomes.

Purpose of the Study:

  • To review and synthesize current epidemiological and intervention data on the role of carbohydrates in relation to weight, insulin resistance, diabetes, inflammation, lipids, and long-term mortality.
  • To clarify the differential effects of various carbohydrate types on cardiometabolic health and cardiovascular outcomes.

Main Methods:

  • Systematic review of rigorous epidemiological and intervention studies focusing on dietary fiber, whole grains, and refined carbohydrates.
  • Analysis of data concerning weight management, diabetes, lipid profiles, inflammation markers, and major adverse cardiac events.

Main Results:

  • High intake of dietary fiber and whole grains is linked to positive metabolic health effects.
  • Diets high in sugar and refined carbohydrates are associated with negative cardiometabolic health impacts.
  • Low-fat and low-carbohydrate diets show similar effects on body weight at comparable energy levels. Substituting carbohydrates with plant-based protein reduces mortality, whereas substitution with animal-derived fat or protein increases it.

Conclusions:

  • The quality of carbohydrates consumed is critical for determining cardiometabolic health and cardiovascular event risk.
  • Current global dietary patterns, characterized by low fiber and high refined carbohydrate intake, necessitate increased efforts to promote higher and more diverse fiber consumption for improved health outcomes.