Related Experiment Video
Updated: Feb 26, 2026

Studying Food Reward and Motivation in Humans
Published on: March 19, 2014
Single-Subject Studies in Translational Nutrition Research
Nicholas J Schork1,2,3, Laura H Goetz2,4,5
1Translational Genomics Research Institute, Phoenix, Arizona 85004;
N-of-1 trials offer a robust method for evaluating personalized nutrition strategies by integrating complex biomedical data. These trials are crucial for validating individualized dietary interventions and health-risk mitigation approaches.
Area of Science:
- Nutritional Science
- Biomedical Research
- Translational Medicine
Background:
- Growing interest in personalized interventions for disease prevention.
- Technological advances enable detailed individual profiling (genetic, biochemical, physiological).
- Need for objective validation of personalized nutrition strategies.
Purpose of the Study:
- Review the motivation, design, and implementation of N-of-1 trials in translational nutrition.
- Assess the utility of personalized nutritional strategies.
- Explore integration of biomarker assays and clinical endpoints.
Main Methods:
- Focus on single-subject or N-of-1 trial designs.
- Discuss novel study designs and data analytical methods.
- Consider integrated use of contemporary biomedical assays and technologies.
Main Results:
- N-of-1 trials accommodate complex, integrated biomedical data.
- Example studies demonstrate the application of N-of-1 trials.
- Analytical methods for complex data generated by these trials are discussed.
Conclusions:
- N-of-1 trials are suitable for assessing personalized nutrition.
- Integration of biomarker assays and clinical endpoints enhances trial utility.
- Further research needed on algorithms for matching nutritional needs and study limitations.
Related Concept Videos
Bioavailability Study Design: Healthy Subjects Versus Patients
Bioequivalence Experimental Study Designs: Repeated Measures, Cross-Over, Carry-Over, and Latin Square Designs
Bioavailability Study Design: Single Versus Multiple Dose Studies
Crossover Experiments
Crossover designs are performed even with smaller sample sizes since the samples can act as their controls. These are better than simple randomized trials since patients are exposed to all the treatments.
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs

![Studying Metabolic Brain Connectivity Using 2-Deoxy-2-[18F]Fluoro-D-Glucose Dynamic Positron Emission Tomography at the Single-subject Level](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F67458.jpg&w=3840&q=50)