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Related Concept Videos

Lipid Digestion01:06

Lipid Digestion

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Lipids are large molecules that are generally not water-soluble. Since most of the digestive enzymes in the human body are water-based, there are specific steps the body must take to break down lipids and make them available for use.
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Structure of Lipids03:38

Structure of Lipids

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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...
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Lipid-derived Compounds in the Human Body01:31

Lipid-derived Compounds in the Human Body

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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,...
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Lipids: Dietary Sources and Requirements01:18

Lipids: Dietary Sources and Requirements

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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...
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Overview of Lipid Metabolism01:24

Overview of Lipid Metabolism

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Lipid metabolism is a crucial process in the human body that involves the synthesis and degradation of lipids. This process is essential for energy production, cell membrane formation, and hormone production, among other functions.
Lipolysis: The Breakdown of Lipids:
Lipolysis is the process of breaking down lipids, particularly triglycerides, into glycerol and fatty acids. This process typically occurs in the adipose tissue and is triggered by various hormones, including glucagon and...
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Lipid Absorption01:24

Lipid Absorption

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Dietary triglycerides from chyme in the duodenum are mixed with bile salts produced by the liver to emulsify fats. As a result, large droplets are broken down into smaller ones, increasing the surface area for enzymatic action. Once emulsified, pancreatic lipases hydrolyze the triglycerides into free fatty acids and monoglycerides.
These breakdown products bind with bile salts and lecithin to form micelles, which quickly pass between microvilli to come in close contact with the apical...
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Related Experiment Video

Updated: Apr 26, 2026

Determination of Tolerable Fatty Acids and Cholera Toxin Concentrations Using Human Intestinal Epithelial Cells and BALB/c Mouse Macrophages
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Determination of Tolerable Fatty Acids and Cholera Toxin Concentrations Using Human Intestinal Epithelial Cells and BALB/c Mouse Macrophages

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Conjugated linoleic acid: a review.

G S Kelly1

  • 1Alternative Medicine Review, 179 Dwight Street, Apt 303, New Haven, CT 06511, USA. kellygs@mac.com

Alternative Medicine Review : a Journal of Clinical Therapeutic
|October 2, 2001
PubMed
Summary

Conjugated linoleic acid (CLA) supplementation shows ambiguous effects on human body composition and lipid levels. Evidence suggests CLA does not significantly impact the immune system in healthy individuals.

Area of Science:

  • Nutritional Science
  • Human Physiology
  • Biochemistry

Background:

  • Conjugated linoleic acid (CLA) is a group of isomers of the omega-6 essential fatty acid, linoleic acid.
  • CLA has shown potential benefits in animal models, particularly regarding lipid metabolism and body composition.

Purpose of the Study:

  • To evaluate the efficacy of conjugated linoleic acid (CLA) supplementation on human body composition.
  • To assess the impact of CLA on lipid profiles and immune system function in humans.

Main Methods:

  • Systematic review and meta-analysis of existing human studies on CLA supplementation.
  • Analysis of data related to body weight, body fat percentage, lipid levels (HDL, LDL, triglycerides), and immune markers.

Main Results:

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  • Human studies show ambiguous results regarding CLA's effect on body composition.
  • While some studies indicate potential improvements in lipid profiles, others report adverse effects like decreased HDL and increased lipoprotein (a).
  • CLA supplementation does not appear to significantly affect immune system performance in healthy subjects.

Conclusions:

  • Current evidence is insufficient to confirm a significant benefit of CLA supplementation for human body composition.
  • The impact of CLA on human lipid profiles is inconsistent, with potential risks observed.
  • CLA supplementation is unlikely to influence immune function in healthy populations.