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Related Concept Videos

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...
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...
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,...
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...
Parentral Nutrition: Centeral and Peripheral Parental Nutrition01:27

Parentral Nutrition: Centeral and Peripheral Parental Nutrition

Parenteral Nutrition (PN) delivers essential nutrients directly into the bloodstream, bypassing the digestive system. It is commonly used for individuals with severe digestive disorders or conditions that prevent normal nutrient absorption.
PN can be administered through two primary routes:
1. Central Parenteral Nutrition (CPN):
CPN involves delivering a high concentration of nutrients through a large vein. This is typically achieved using a Peripherally Inserted Central Catheter (PICC) or,...
Cholesterol: Significance and Regulation01:29

Cholesterol: Significance and Regulation

Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...

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Related Experiment Video

Updated: May 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

Relationship between central and peripheral fatty acids in humans.

Jade Guest1, Manohar Garg, Ayse Bilgin

  • 1School of Medical Sciences, University of New South Wales, Wallace Wurth Building, Office #203, Sydney, NSW 2052, Australia.

Lipids in Health and Disease
|May 29, 2013
PubMed
Summary

Systemic fatty acids, including omega-3 and omega-6 polyunsaturated fatty acids (PUFA), correlate with concentrations in the cerebrospinal fluid (CSF). This suggests some fatty acids cross the blood-brain barrier (BBB) to influence brain fatty acid levels.

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Quantification of Endothelial Fatty Acid Uptake using Fluorescent Fatty Acid Analogs
06:03

Quantification of Endothelial Fatty Acid Uptake using Fluorescent Fatty Acid Analogs

Published on: August 15, 2025

Related Experiment Videos

Last Updated: May 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

Quantification of Endothelial Fatty Acid Uptake using Fluorescent Fatty Acid Analogs
06:03

Quantification of Endothelial Fatty Acid Uptake using Fluorescent Fatty Acid Analogs

Published on: August 15, 2025

Area of Science:

  • Neuroscience
  • Biochemistry
  • Human Physiology

Background:

  • Fatty acids are crucial in the central nervous system (CNS) and periphery.
  • Limited research exists on comparing central and peripheral fatty acid stores.

Purpose of the Study:

  • To compare fatty acid distribution in human whole blood and cerebrospinal fluid (CSF).
  • To investigate relationships between systemic and central fatty acid concentrations.

Main Methods:

  • Analyzed fatty acid profiles (PUFA, SFA, MUFA) in matched CSF and whole blood samples from 28 humans.
  • Employed gas chromatography with flame ionization detection.
  • Utilized multiple linear regression analysis, controlling for age.

Main Results:

  • Significant positive correlations found between whole blood and CSF omega-3 fatty acids (DPA, DHA).
  • Direct association observed for omega-6 PUFA, arachidonic acid (AA), between blood and CSF.
  • An inverse relationship was noted for oleic acid between central and peripheral samples.

Conclusions:

  • Findings demonstrate relationships between central and peripheral fatty acids.
  • Suggests systemic fatty acids cross the blood-brain barrier (BBB).
  • Highlights the influence of systemic fatty acids on CNS concentrations.