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Related Concept Videos

Lipids: Dietary Sources and Requirements01:18

Lipids: Dietary Sources and Requirements

Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ meats, shellfish,...
Structure of Lipids03:38

Structure of Lipids

Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic birds and...
Structure of Lipids03:38

Structure of Lipids

Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic birds and...
Structure of Lipids03:38

Structure of Lipids

Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic birds and...
Lipid-derived Compounds in the Human Body01:31

Lipid-derived Compounds in the Human Body

Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various  biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin, delayed...
What are Lipids?01:31

What are Lipids?

Lipids function as structural components of cellular membranes, in addition to acting as energy reservoirs and signaling molecules. They are thus crucial to all living organisms.  The three biologically important classes of lipids are triglycerides, phospholipids, and steroids.
Non-Polar and Hydrophobic Characteristics of Lipids
Lipids are a structurally and functionally diverse group of hydrocarbons—compounds consisting of carbon and hydrogen atoms. The carbon-carbon and carbon-hydrogen bonds...

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Biochemical and High Throughput Microscopic Assessment of Fat Mass in Caenorhabditis Elegans
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Dietary lipids from an evolutionary perspective: sources, structures and functions.

J Bruce German1

  • 1Department of Food Science and Technology, University of California-Davis, CA 95616, USA. jbgerman@ucdavis.edu

Maternal & Child Nutrition
|March 4, 2011
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Summary

Understanding lipid functions is crucial for dietary recommendations and diagnosing imbalances. Research highlights the diverse roles of fatty acids in membranes, metabolism, and signaling, emphasizing the need for varied dietary intake.

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Last Updated: Jun 4, 2026

Biochemical and High Throughput Microscopic Assessment of Fat Mass in Caenorhabditis Elegans
16:07

Biochemical and High Throughput Microscopic Assessment of Fat Mass in Caenorhabditis Elegans

Published on: March 30, 2013

Realistic Membrane Modeling Using Complex Lipid Mixtures in Simulation Studies
07:31

Realistic Membrane Modeling Using Complex Lipid Mixtures in Simulation Studies

Published on: September 1, 2023

Evaluation of Lipid Droplet Size and Fusion in Bovine Hepatic Cells
08:37

Evaluation of Lipid Droplet Size and Fusion in Bovine Hepatic Cells

Published on: March 10, 2023

Area of Science:

  • Biochemistry
  • Nutritional Science
  • Molecular Biology

Background:

  • Lipids are essential biomolecules with poorly understood functions, hindering dietary recommendations and diagnostics.
  • Fatty acids are key components of cell membranes, lipoproteins, and signaling pathways, yet their structural impacts are unclear.
  • Docosahexaenoic acid enhances membrane fluidity and reduces ion leakage, demonstrating specific functional roles.

Purpose of the Study:

  • To elucidate the complex functions of various lipid structures.
  • To understand the implications of different fatty acid compositions in biological systems.
  • To inform evidence-based dietary guidelines for lipid intake.

Main Methods:

  • Literature review of lipid functions in membranes, metabolism, and signaling.
  • Analysis of biophysical properties conferred by specific fatty acids, like docosahexaenoic acid.
  • Examination of the diversity of fatty acids in biological structures such as milk fat globules.

Main Results:

  • Specific fatty acids, such as docosahexaenoic acid, exhibit distinct biophysical effects on membranes.
  • The functional consequences of diverse fatty acid structures in lipoproteins and milk fat are largely unknown.
  • Saturated and monounsaturated fatty acids are increasingly recognized for their roles as signaling molecules.

Conclusions:

  • A comprehensive understanding of lipid structure-function relationships is needed for accurate dietary guidance.
  • Dietary recommendations should consider the diversity of fatty acids and their complex roles.
  • Further research is essential to unravel the intricate functions of lipids in health and disease.