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Related Concept Videos

Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion01:20

Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion

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Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
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Drug Dosing: Obese Patients01:21

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In the United States, obesity is a prominent concern. It is linked to heightened mortality rates due to increased occurrences of conditions such as hypertension, atherosclerosis, coronary artery disease, and diabetes compared to nonobese individuals. A patient is classified as obese if their actual body weight surpasses the ideal or desirable body weight by 20%, based on Metropolitan Life Insurance Company data. Ideal body weights consider average weights and heights for males and females...
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Pharmacokinetics in Obese Patients: Drug Absorption and Distribution01:25

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Obesity significantly alters the pharmacokinetic processes of drug absorption and distribution, presenting unique challenges in medical treatment. The increased fat tissue and decreased lean muscle in obese individuals can significantly affect how drugs are absorbed into the body and distributed across different tissues. This alteration can lead to variances in the effectiveness and safety of medications, necessitating adjustments in dosing or drug selection for obese patients.One notable...
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Obesity01:24

Obesity

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The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
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Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
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Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
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Related Experiment Video

Updated: Feb 23, 2026

Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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The gut microbiome and obesity.

Meredith A J Hullar1, Johanna W Lampe

  • 1Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.

Nestle Nutrition Institute Workshop Series
|November 7, 2012
PubMed
Summary

The gut microbiome, a collection of microbes in your digestive tract, may play a role in obesity. Alterations in gut bacteria composition and function are linked to weight gain and metabolic changes.

Area of Science:

  • Microbiology
  • Metabolic Health
  • Obesity Research

Background:

  • The gut microbiome's composition is increasingly recognized as an environmental factor influencing host health.
  • Human studies indicate a correlation between obesity and altered gut microbiota, including reduced diversity and modified metabolic pathways.

Purpose of the Study:

  • To explore the mechanisms by which the gut microbiome influences host metabolism and energy homeostasis.
  • To elucidate how microbial fermentation and energy extraction contribute to obesity.

Main Methods:

  • This study synthesizes findings from human and animal research on gut microbiota and obesity.
  • Analysis of microbial metabolic pathways and their impact on host energy balance.

Main Results:

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  • Obesity is associated with increased microbial fermentation and enhanced energy extraction from the diet.
  • The gut microbiome influences host metabolism through various pathways, including regulating energy uptake and modulating inflammation.

Conclusions:

  • The gut microbiome is a significant factor in the development of obesity.
  • Microbial alterations can lead to increased energy harvest and contribute to weight gain through metabolic and inflammatory pathways.