ClinicalTrials.gg
RecruitingNCT07757347FRUageUpdated Aug 11, 2026

Fructose and (Aging)

An interventional study of Fructose and Glucose in Intestinal Permeability and Immune Response, sponsored by University of Vienna. Recruiting at 1 site in Austria. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-08-11.

Sponsored by University of Vienna · Not applicable, Interventional, and Basic science

From the registry’s dates

  • Started Apr 2026; still recruiting 7 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
32
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

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

02

Conditions studied

  • Intestinal Permeability
  • Immune Response
03

In context

Lead sponsor

University of Vienna is the lead sponsor of 49 studies on the registry; 16 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • all gender, healthy collective ≥ 18 years old

Exclusion criteria

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%)
  • \< 19 kg/m2 \& > 29,9 kg/m2
  • Bariatric surgery
  • Smoking
  • Liver diseases
  • Renal insufficiency
  • Rheumatoid arthritis
  • 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
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

COPD

Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.

05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Single (Participant)
Enrollment
32 participants (estimated)

Study arms

  • Experimental
    Fructose

    Following a standardization of their nutritional intake for three days, participants will receive a drink supplemented with free fructose.

    Other: Fructose

  • Experimental
    Glucose

    Following a standardization of their nutritional intake for three days, participants will receive a drink supplemented with free glucose.

    Other: Glucose

Interventions

  • OtherFructose

    Following a standardization of their nutritional intake for three days, participants will either receive a drink supplemented with low doses of free fructose (5%).

    Also known as: Diet

  • OtherGlucose

    Following a standardization of their nutritional intake for three days, participants will either receive a drink supplemented with low doses of free glucose (5 %).

    Also known as: Diet

06

What researchers measure

Primary outcomes

  1. Changes in markers of intestinal permeability

    Changes in concentrations of bacterial endotoxin in blood plasma

    Time frame: At the end of the treatment (1 month)

  2. Cytokine release from blood immune cells stimulated with bacterial toxins

    Changes in cytokine concentration in supernatant of immune cells before and after the treatments

    Time frame: At the end of the treatment (1 month)

07

Study locations

1 of 1 sites recruiting
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Apr 2026 (actual). Primary completion is estimated for Jul 2027, 15 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 30, 2026
First posted
Aug 11, 2026
StartActual
Apr 1, 2026
Primary completionEst.
Jul 2027
CompletionEst.
Dec 2027
Last update
Aug 11, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 11, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT07757347
Lead sponsor
University of Vienna
Responsible party
Prof. Dr. Ina Bergheim (Prof. Dr., University of Vienna) — Principal investigator
First posted
Aug 11, 2026
Start date
Apr 1, 2026
Primary completion
Jul 2027 (estimated)
Completion
Dec 2027 (estimated)
Last update
Aug 11, 2026

Study contacts

Ina Bergheim, Prof.
Contact
ina.bergheim@univie.ac.at
+43-1-4277-54981

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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