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Related Concept Videos

Overview of Fatty Acid Metabolism01:28

Overview of Fatty Acid Metabolism

Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
Sugars as Energy Storage Molecules01:10

Sugars as Energy Storage Molecules

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...
Fats as Energy Storage Molecules01:06

Fats as Energy Storage Molecules

Triglycerides are a form of long-term energy storage molecules. They are made of glycerol and three fatty acids. To obtain energy from fat, triglycerides must first be broken down by hydrolysis into their two principal components, fatty acids and glycerol. This process, called lipolysis, takes place in the cytoplasm. The resulting fatty acids are oxidized by β-oxidation into acetyl-CoA, which is used by the Krebs cycle. The glycerol that is released from triglycerides after lipolysis directly...
Sugars as Energy Storage Molecules01:10

Sugars as Energy Storage Molecules

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...
Fats as Energy Storage Molecules01:06

Fats as Energy Storage Molecules

Triglycerides are a form of long-term energy storage molecules. They are made of glycerol and three fatty acids. To obtain energy from fat, triglycerides must first be broken down by hydrolysis into their two principal components, fatty acids and glycerol. This process, called lipolysis, takes place in the cytoplasm. The resulting fatty acids are oxidized by β-oxidation into acetyl-CoA, which is used by the Krebs cycle. The glycerol that is released from triglycerides after lipolysis directly...
Obesity01:24

Obesity

The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...

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Related Experiment Video

Updated: Jul 11, 2026

Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans
10:29

Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans

Published on: June 4, 2014

Fat and sugar: an economic analysis.

Adam Drewnowski1

  • 1Center for Public Health Nutrition, University of Washington, Seattle 98195, USA. adamdrew@u.washington.edu

The Journal of Nutrition
|March 4, 2003
PubMed
Summary

As incomes rise, dietary fat and sugar intake increases, impacting diet quality. In developed nations, lower incomes correlate with obesity, suggesting a socioeconomic link to diet costs and structure.

Area of Science:

  • Nutritional Science
  • Health Economics
  • Sociology

Background:

  • Engel's law states that food expenditure share decreases with rising income.
  • Dietary patterns and macronutrient composition also shift significantly with income changes.
  • Technological advancements have lowered energy costs, particularly for high-fat and high-sugar foods.

Purpose of the Study:

  • To examine the relationship between income levels and dietary macronutrient composition.
  • To investigate the link between socioeconomic status and diet quality.
  • To explore the socioeconomic determinants of obesity, particularly in developed nations.

Main Methods:

  • Analysis of aggregate and individual-level data on income and dietary intake.
  • Cross-national comparisons of food consumption patterns.

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Fat Preference: A Novel Model of Eating Behavior in Rats

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High Fat Diet Feeding and High Throughput Triacylglyceride Assay in Drosophila Melanogaster

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Related Experiment Videos

Last Updated: Jul 11, 2026

Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans
10:29

Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans

Published on: June 4, 2014

Fat Preference: A Novel Model of Eating Behavior in Rats
05:57

Fat Preference: A Novel Model of Eating Behavior in Rats

Published on: June 27, 2014

High Fat Diet Feeding and High Throughput Triacylglyceride Assay in Drosophila Melanogaster
08:28

High Fat Diet Feeding and High Throughput Triacylglyceride Assay in Drosophila Melanogaster

Published on: September 13, 2017

  • Examination of the relationship between income, diet costs, and obesity prevalence.

    • Main Results:

    • Higher income nations exhibit greater consumption of added sugars and fats.
    • Within high-income countries, lower socioeconomic groups consume lower-quality diets.
    • Obesity in the US is paradoxically linked to lower incomes, unlike in poorer nations.

    Conclusions:

    • Dietary structure and quality are strongly influenced by income.
    • Obesity in affluent societies may be a socioeconomic issue tied to diet costs and composition.
    • Further research is needed to understand the complex interplay of income, diet, and health outcomes.