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Related Concept Videos

Lipid Digestion01:06

Lipid Digestion

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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Glucose Absorption Into the Small Intestine

Complex carbohydrates consumed cannot be absorbed into the small intestine in their original form. First, they must be hydrolyzed to a monosaccharide form such as glucose or galactose. These monosaccharides are then transported across the intestinal membrane and into the blood via transcellular transport. The intestinal epithelial cells allow the movement of these monosaccharides with a defined 'entry' through membrane transporter proteins present on their apical membrane and 'exit' via the...
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.
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Protein Absorption01:12

Protein Absorption

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Lipid Absorption01:24

Lipid Absorption

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Related Experiment Video

Updated: Jun 11, 2026

The Mesenteric Lymph Duct Cannulated Rat Model: Application to the Assessment of Intestinal Lymphatic Drug Transport
13:17

The Mesenteric Lymph Duct Cannulated Rat Model: Application to the Assessment of Intestinal Lymphatic Drug Transport

Published on: March 6, 2015

Intestinal cholesterol absorption in the chyluria model.

S Q Doi1, H Meinertz, K Nilausen

  • 1Department of Internal Medicine, University of São Paulo Medical School, Brazil.

Journal of Lipid Research
|October 1, 1987
PubMed
Summary

Cholesterol absorption methods were compared in patients with filarial chyluria. Isotopic fecal recovery and lymph balance methods showed similar results for dietary cholesterol absorption, indicating their reliability.

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Last Updated: Jun 11, 2026

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06:14

The Isolation of Flowing Mesenteric Lymph in Mice to Quantify In Vivo Kinetics of Dietary Lipid Absorption and Chylomicron Secretion

Published on: November 30, 2022

Area of Science:

  • Gastroenterology
  • Metabolic Research
  • Nutritional Science

Background:

  • Accurate measurement of dietary cholesterol absorption is crucial for understanding lipid metabolism.
  • Filarial chyluria presents unique challenges for assessing intestinal function and lipid transport.

Purpose of the Study:

  • To compare isotopic methods with the lymph cholesterol balance procedure for measuring dietary cholesterol absorption in filarial chyluria patients.
  • To investigate the absorption of endogenous cholesterol and its relationship with dietary cholesterol absorption.

Main Methods:

  • Isotopic methods involving intravenous injection and fecal recovery of radioactive cholesterol.
  • Lymph cholesterol balance procedure using cholesterol-containing and cholesterol-free diets.
  • Estimation of plasma cholesterol transudation using radioactive beta-sitosterol.

Main Results:

  • Isotopic fecal recovery and lymph balance methods yielded comparable results for dietary cholesterol absorption (353 mg/day vs. 326 mg/day).
  • Plasma cholesterol transudation into intestinal lymph was independent of dietary factors.
  • Endogenous cholesterol was preferentially absorbed over dietary cholesterol without competition.

Conclusions:

  • Isotopic methods, particularly fecal recovery, are reliable for measuring dietary cholesterol absorption in filarial chyluria.
  • Dietary cholesterol absorption is distinct from endogenous cholesterol absorption, with preferential absorption of endogenous cholesterol.
  • Esterification of dietary cholesterol in lymph is common but not essential for absorption.