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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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Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
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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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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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Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents
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Food availability/convenience and obesity.

Penny Gordon-Larsen1

  • 1Department of Nutrition, Gillings School of Global Public Health and School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC gordon_larsen@unc.edu.

Advances in Nutrition (Bethesda, Md.)
|November 16, 2014
PubMed
Summary
This summary is machine-generated.

Neighborhood environments impact obesity, but evidence is inconsistent. More research is needed on food access, individual choices, and policy impacts on diet and weight.

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Area of Science:

  • Public Health
  • Environmental Health
  • Nutrition Science

Background:

  • Neighborhood environments are central to obesity prevention efforts, particularly concerning food deserts (areas with limited healthy food access).
  • Existing evidence shows inconsistencies regarding the links between neighborhood environment, food availability, dietary behaviors, and obesity.
  • Associations vary significantly across different racial/ethnic groups, genders, regions, and urban settings, complicating interpretation.

Purpose of the Study:

  • To highlight the complexities and limitations in current research on neighborhood food environments and obesity.
  • To emphasize the need for more nuanced research addressing individual decision-making and resource placement.
  • To call for rigorous evaluation of food environment policies and their impact on diet and weight.

Main Methods:

  • The study reviews existing literature, identifying limitations such as reliance on cross-sectional data and commercial listings.
  • It points out the need for longitudinal data and advanced statistical methods to understand residential choices and resource distribution.
  • The review stresses the importance of incorporating behavioral data on purchasing patterns and interactions with the food environment.

Main Results:

  • Current research is limited by cross-sectional designs and a lack of understanding of how food resources are established and accessed.
  • There is significant heterogeneity in how neighborhood environments affect health outcomes across diverse subpopulations.
  • The potential for individuals to selectively move to areas with better food access is an understudied factor.

Conclusions:

  • More sophisticated research using longitudinal data is required to untangle the complex relationships between neighborhood food environments, individual behaviors, and obesity.
  • Improved data quality and depth, including behavioral insights, are crucial for understanding food access and availability.
  • Rigorous scientific evaluation of policy changes impacting the food environment is essential to guide effective obesity prevention strategies.