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Related Concept Videos

Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy01:30

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Various diagnostic tests are employed in the diagnostic process for Inflammatory Bowel Disease (IBD), particularly to differentiate between Crohn's disease and ulcerative colitis.
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The lac operon in Escherichia coli is a model for understanding inducible gene regulation and metabolic flexibility. It integrates local control by lactose and global regulation through catabolite repression, enabling E. coli to preferentially metabolize glucose when available and switch to lactose utilization when glucose is scarce.Structure and Function of the lac OperonThe lac operon contains three structural genes: lacZ (β-galactosidase), lacY (lactose permease), and lacA...
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In situ experiments, such as the Doluisio method and Single-Pass Perfusion technique, provide critical insights into drug uptake by simulating in vivo conditions for drug absorption.
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In vitro experiments are crucial for understanding the transport and absorption of drugs through biological materials. These studies employ varied methods such as the diffusion cell method, the everted sac technique, and the everted ring technique.
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Hydrolysis01:15

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Overview
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Updated: Jun 6, 2025

Measuring Lactase Enzymatic Activity in the Teaching Lab
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Lactose intolerance - A practical approach, Part 1.

R B McFee1

  • 1Medical Director, Ellis Medical Toxicology, USA.

Disease-A-Month : DM
|December 3, 2024
PubMed
Summary
This summary is machine-generated.

This review covers lactose intolerance, a common gastrointestinal issue. It also discusses other GI conditions with similar symptoms but different treatments, crucial for clinical practice.

Keywords:
Cows Milk AllergyDairy intoleranceFood associated gastrointestinal disorderLactose IntoleranceMilk intolerance

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Area of Science:

  • Gastroenterology
  • Clinical Nutrition
  • Toxicology

Background:

  • Adverse food reactions are clinically significant, encompassing anaphylaxis and chronic intolerance syndromes.
  • Gastrointestinal (GI) conditions related to food require careful diagnosis due to overlapping presentations.
  • Lactose intolerance is a prevalent GI condition with significant clinical implications.

Purpose of the Study:

  • To review the key aspects of food toxicology, immunology, and gastroenterology relevant to clinical practice.
  • To differentiate lactose intolerance from other GI conditions with similar symptoms.
  • To highlight the importance of accurate diagnosis for appropriate treatment of food-related GI disorders.

Main Methods:

  • Literature review focusing on clinical practice and prevalent GI conditions.
  • Analysis of diagnostic criteria and treatment strategies for lactose intolerance and similar GI disorders.
  • Synthesis of information on food-related toxicology, immunology, and gastroenterology.

Main Results:

  • Lactose intolerance is a common condition requiring specific management.
  • Several GI conditions mimic lactose intolerance, necessitating distinct treatment approaches.
  • Accurate differentiation is key to effective patient management.

Conclusions:

  • Understanding the nuances of food-related GI conditions is vital for clinicians.
  • Distinguishing lactose intolerance from other GI disorders ensures appropriate therapeutic interventions.
  • This review provides a framework for managing prevalent food-related gastrointestinal issues.