Related Experiment Video
Updated: Aug 6, 2026
09:10
Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents
Published on: November 1, 2019
What should we eat? Evidence from observational studies
Stephen M Adams1, John B Standridge
1Department of Family Medicine, University of Tennessee Health Science Center College of Medicine, Chattanooga Unit, Chattanooga, TN, USA. Stephen.Adams@erlanger.org
Southern Medical Journal
|July 27, 2006
Summary
A healthy diet rich in fruits, vegetables, and whole grains, while limiting saturated fats and sodium, is linked to lower rates of major diseases like heart attack and cancer.
Area of Science:
- Nutrition Science
- Preventive Medicine
- Epidemiology
Background:
- Observational studies reveal strong correlations between dietary patterns and disease incidence.
- Specific dietary habits are associated with reduced risks of cardiovascular disease, cancer, diabetes, and hypertension.
Purpose of the Study:
- To synthesize existing evidence on the relationship between diet and common chronic diseases.
- To define an optimal dietary pattern for disease prevention based on current scientific understanding.
Main Methods:
- Review of observational and interventional studies examining diet-disease relationships.
- Analysis of evidence linking specific food groups and nutrients to health outcomes.
Main Results:
- A diet emphasizing fruits, vegetables, nuts, unsaturated oils, whole grains, and fish is associated with reduced disease rates.
- Minimizing saturated fats (including trans fats), sodium, and red meats is crucial for disease prevention.
- Maintaining a healthy weight through appropriate calorie intake is a key component of the optimal diet.
Conclusions:
- The evidence supports a specific dietary pattern for reducing the risk of major chronic illnesses.
- While some dietary benefits are proven by intervention, further research may clarify causation for other aspects.
- Adopting this evidence-based dietary approach is recommended for public health and disease prevention.
Related Concept Videos
01:11Observational Studies
Observational studies are a type of analytical study where researchers observe events without any interventions. In other words, the researcher does not influence the response variable or the experiment's outcome.
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One example of...
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One example of...
01:53Cause and Effect
While variables are sometimes correlated because one does cause the other, it could also be that some other factor, a confounding variable, is actually causing the systematic movement in our variables of interest. For instance, as sales in ice cream increase, so does the overall rate of crime. Is it possible that indulging in your favorite flavor of ice cream could send you on a crime spree? Or, after committing crime do you think you might decide to treat yourself to a cone?
01:08Data Collection by Observations
Data collection refers to a systematic way of obtaining, observing, measuring, and analyzing accurate information. Observational studies are one of the most widely used methods of data collection. It involves collecting data by observing the behavior and physical characteristics of a sample without making any modifications to the sample.
An astronomer viewing the motion and brightness of stars in the sky and recording the data is an example of observational data collection. A botanist recording...
An astronomer viewing the motion and brightness of stars in the sky and recording the data is an example of observational data collection. A botanist recording...
00:48Optimal Foraging
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
01:20Study Designs in Epidemiology
Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and case-control studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and case-control studies.
01:12What is an Experiment?
An experiment is a planned activity carried out under controlled conditions. The purpose of an experiment is to investigate the relationship between two variables. When one variable causes change in another, we call the first variable the explanatory or independent variable. The affected variable is called the response or dependent variable. In a randomized experiment, the researcher manipulates values of the explanatory variable and measures the resulting changes in the response variable. The...