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Related Concept Videos

Dietary Connections01:23

Dietary Connections

In biological systems, most metabolic pathways are interconnected. The cellular respiration processes that convert glucose to ATP—such as glycolysis, pyruvate oxidation, and the citric acid cycle—tie into those that break down other organic compounds. As a result, various foods—from apples to cheese to guacamole—end up as ATP. In addition to carbohydrates, food also contains proteins and lipids—such as cholesterol and fats. All of these organic compounds are used as energy sources to produce...
Assessment of the Gastrointestinal System I: Subjective Data01:17

Assessment of the Gastrointestinal System I: Subjective Data

Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
Health History
The initial step in assessing the GI system is obtaining a comprehensive health history. This includes inquiring about the patient's history or presence of problems related to...
Assessment of the Gastrointestinal System II: Health Perception Pattern01:29

Assessment of the Gastrointestinal System II: Health Perception Pattern

Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include:

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Related Experiment Video

Updated: Jun 11, 2026

'Boden Food Plate': Novel Interactive Web-based Method for the Assessment of Dietary Intake
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NutriDiary, a Smartphone-Based Dietary Record App: Description and Usability Evaluation.

Linda Klasen1, Stefanie Anna Julia Koch1, Maike Elena Benz1

  • 1Nutritional Epidemiology, Institute of Nutrition and Food Sciences, University of Bonn, Friedrich-Hirzebruch-Allee 7, Bonn, 53115, Germany, 49 228 73 6049.

JMIR Human Factors
|February 11, 2025
PubMed
Summary

NutriDiary, a smartphone app for weighed dietary records, demonstrated good usability and acceptability in a German study. This tool is promising for epidemiological research on usual dietary intake.

Keywords:
appbarcode scanningdietary assessmentfood recordmobile phone

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Area of Science:

  • Nutrition science
  • Public health
  • Digital health

Background:

  • Estimating usual dietary intake requires repeated short-term dietary assessments.
  • Smartphone applications offer a modern approach to collecting dietary data.

Purpose of the Study:

  • To describe the NutriDiary smartphone application for collecting weighed dietary records (WDRs).
  • To evaluate the usability and acceptability of NutriDiary among German users.

Main Methods:

  • NutriDiary allows food entry via text search, barcode scanning, or free text.
  • A study involved 74 participants (experts and laypersons) completing a 1-day WDR and a sample meal using the app.
  • System Usability Scale (SUS) scores were calculated, and predictors for SUS were analyzed.

Main Results:

  • The median SUS score was 75, indicating good usability.
  • Older age was associated with lower usability scores.
  • Participants generally preferred NutriDiary over traditional paper-based methods.

Conclusions:

  • NutriDiary exhibits good usability and acceptability.
  • The app is a promising tool for dietary assessment in epidemiological studies.