Fructose and (Aging) (FRUage)

August 5, 2026 updated by: Prof. Dr. Ina Bergheim, University of Vienna

Investigation of the Effect of Fructose on Health Parameters and the Intestinal Barrier in Healthy Individuals

The aim of the present study is to investigate the effect of fructose consumption on health parameters and the intestinal barrier in healthy individuals

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

32

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • all gender, healthy collective ≥ 18 years old

Exclusion Criteria:

  • Chronic inflammatory diseases of the gastrointestinal tract
  • Metabolic diseases or taking medication to treat metabolic diseases
  • Fructose malabsorption
  • Hereditary fructose intolerance
  • Food intolerances and/or allergies, as well as food allergies that require special dietary interventions
  • Special diets, such as vegetarian/vegan diets
  • Unstable body weight within the last 6 months (fluctuations of > 5%)
  • BMI < 19 kg/m2 & > 29,9 kg/m2
  • Bariatric surgery
  • Smoking
  • Liver diseases
  • Renal insufficiency
  • Rheumatoid arthritis
  • COPD with ≥ 2 exacerbations per year
  • Chronic pancreatitis or recurrent acute pancreatitis
  • Alcohol consumption above 10 g/d for women and above 20 g/d for men
  • Pregnancy and breastfeeding
  • Viral or bacterial infections that occurred no longer than 3 weeks ago

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Fructose
Following a standardization of their nutritional intake for three days, participants will receive a drink supplemented with free fructose.
Other: Fructose
Following a standardization of their nutritional intake for three days, participants will either receive a drink supplemented with low doses of free fructose (5%).
Other Names:
  • Diet
Experimental: Glucose
Following a standardization of their nutritional intake for three days, participants will receive a drink supplemented with free glucose.
Other: Glucose
Following a standardization of their nutritional intake for three days, participants will either receive a drink supplemented with low doses of free glucose (5 %).
Other Names:
  • Diet

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Changes in markers of intestinal permeability
Time Frame: At the end of the treatment (1 month)
Changes in concentrations of bacterial endotoxin in blood plasma
At the end of the treatment (1 month)
Cytokine release from blood immune cells stimulated with bacterial toxins
Time Frame: At the end of the treatment (1 month)
Changes in cytokine concentration in supernatant of immune cells before and after the treatments
At the end of the treatment (1 month)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Vienna

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 1, 2026

Primary Completion (Estimated)

July 1, 2027

Study Completion (Estimated)

December 1, 2027

Study Registration Dates

First Submitted

April 30, 2026

First Submitted That Met QC Criteria

August 5, 2026

First Posted (Actual)

August 11, 2026

Study Record Updates

Last Update Posted (Actual)

August 11, 2026

Last Update Submitted That Met QC Criteria

August 5, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • UVienna25

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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