Related Experiment Video
Updated: Apr 28, 2026
04:54
Iterative Development of an Innovative Smartphone-Based Dietary Assessment Tool: Traqq
Published on: March 19, 2021
4.9K
Portion size: what we know and what we need to know.
1a Department of Psychology , Swansea University , Wales , United Kingdom.
Critical Reviews in Food Science and Nutrition
|June 11, 2014
Summary
Increasing food portion sizes leads to greater consumption. Understanding how portion size interacts with other factors is crucial for managing energy intake and developing practical strategies, despite market challenges.
Area of Science:
- Nutrition Science
- Behavioral Economics
Background:
- Growing evidence indicates an increase in food portion sizes.
- Laboratory studies show larger portions increase food consumption.
Purpose of the Study:
- To examine the complex relationship between portion size and food intake.
- To investigate factors influencing portion size selection beyond laboratory settings.
- To establish the role of portion size in energy intake within real-world eating patterns.
Main Methods:
- Analysis of freely chosen meals over extended periods.
- Consideration of diverse food types and energy densities.
- Evaluation of external factors like packaging, labeling, and advertising.
Main Results:
- Portion size is a significant determinant of food intake.
- Multiple factors interact to influence chosen portion sizes.
- Confounding variables complicate the direct assessment of portion size impact.
Conclusions:
- Portion size is a critical factor in energy intake regulation.
- Further research is needed to disentangle portion size effects from other influences.
- Developing methods to alter portion sizes faces challenges in a free market due to consumer price sensitivity.
Related Concept Videos
01:30Regulation of Food Intake
2.8K
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...
2.8K
01:19Sample Size Calculation
5.2K
Knowledge of the sample size is the first requirement to conduct random sampling or an experiment. The sample size is the total number of units, observations, or groups (in some cases) used to get the data to estimate a population parameter. As the name suggests, the sample size is that of the sample drawn from the population and differs from the population size.
The sample size for the given experiment or sampling effort is fundamental to any study design. Sample size decides the number of...
The sample size for the given experiment or sampling effort is fundamental to any study design. Sample size decides the number of...
5.2K
01:20Taste Buds and Receptors
5.6K
Gustation, or the sense of taste, is intrinsically linked to the anatomical structures located on the tongue. This organ's surface, along with the entirety of the oral cavity, is adorned with stratified squamous epithelium. Evident on the tongue are elevated structures known as papillae (singular = papilla), which house the mechanisms for the transduction of gustatory stimuli. Four distinct types of papillae exist, each identified by their unique morphological attributes: the circumvallate,...
5.6K
01:21Dose Size and Dosing Frequency: Determination Methods
802
Determining the optimal dose size and dosing frequency in pharmacotherapy is crucial for achieving therapeutic effectiveness while minimizing adverse effects. This article explores the methodologies employed in determining these parameters, focusing on their significance and interplay to tailor dosing regimens.Dose Size: Dose size refers to the amount of a drug administered in a single dose. It is determined based on the drug's pharmacodynamics and pharmacokinetics properties and...
802
01:03Dose-Response Relationship: Overview
5.2K
Agonists can bind with and activate receptors, resulting in the formation of drug-receptor complexes. Once formed, these complexes catalyze many biochemical processes at the cellular level and subsequently induce a pharmacologic response. The degree of response is directly proportional to the fraction of activated receptors, which in turn, depends on the concentration of the drug at the receptor site as well as the sensitivity of the receptor. An increase in the administered dose contributes to...
5.2K
01:24Rational Dosage Regimen: Maintenance Dose and Loading Dose
5.4K
A rational dosage regimen considers a drug's pharmacokinetics, including its absorption, distribution, metabolism, and elimination from the body. By understanding these factors, the appropriate dosage can be determined, and the dosing schedule can be designed to achieve and maintain the desired therapeutic effect while minimizing adverse effects.
In most cases, drugs are administered repetitively or infused continuously to maintain a steady-state concentration in the body. At a steady...
In most cases, drugs are administered repetitively or infused continuously to maintain a steady-state concentration in the body. At a steady...
5.4K