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HealthyNCT01021969

Effects of Dietary Fructose on Glucose and Lipid Metabolism in Healthy Human Subjects

A study testing Fructose in people with Healthy, run by University of Zurich at 1 site in Switzerland.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The increasing intake of fructose has been associated with an increase in obesity among US children and adolescents, but its "dose dependent" effects on insulin sensitivity and lipid metabolism has not been studied in detail. Methods: 36 healthy male adult human subjects will be included in this study. Read more about this study

Who is it for?
Ages 20 to 50 years, men only
Conditions the study is for
Healthy
What is being tested?
Fructose
How many people
36 participants
Where
1 siteSwitzerland
Study dates
Jun 2007to Jul 2011
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 20 to 50 years
  • Men only
  • No healthy volunteers
  • Adult

Who may be able to join

  • Healthy male volunteers aged 20-50y with a BMI between 19 and 25 kg/m2

Who cannot join

  • Acute infection, malignant disease, renal (abnormal creatinine), hepatic (more than two-fold increased transaminases), pulmonary, neurological (epilepsy) or major psychiatric diseases, manifested atherosclerosis
  • Fasting plasma glucose > 5.6 mmol/l
  • Known alcohol or drug abuse
  • HIV-antibody positive
  • Subjects likely to fail to comply with the study protocol
  • Smoking (>1 cigarette/month)
Show all 9Show fewer
  • Subjects who do not give informed consent
  • Additional exclusion criteria after baseline measurements:
  • Subjects with high baseline consumption of soft drinks (>60g of carbohydrates daily)

Trial locations and contacts

1 site in 1 country.

Switzerland1 site
  • University Hospital Zurich

    Zurich, Canton of Zurich, 8091

Other trials in Switzerland

About this study

The increasing intake of fructose has been associated with an increase in obesity among US children and adolescents, but its "dose dependent" effects on insulin sensitivity and lipid metabolism has not been studied in detail. Methods: 36 healthy male adult human subjects will be included in this study. They will be randomly allocated into a low, moderate or high fructose, a moderate or high glucose and a sucrose diet for 3 weeks. In randomized order and with 4 week wash out intervals each subject will receive all six different diets. Three day food records will be used to measure total fructose and glucose intake. During the low fructose diet subjects will be instructed to avoid nutrients containing fructose aiming at consumption of less than 1g fructose/d. During the moderate fructose diet subjects will receive 3x13.3g of fructose or glucose, respectively. High fructose diet subjects will receive either 3x26.7g/d of fructose, 3x 26.7g/d of glucose or 3x 26.7g/d of sucrose in the form of three daily soft drinks taken together with the three main meals.

75 g oral glucose tolerance testing will be performed and composite insulin sensitivity index will be calculated The presence of phosphorylated fructose metabolites in plasma will be measured by targeted LC-MS/MS. In addition, metabolite biomarkers in plasma will be screened by untargeted metabolite profiling using both LC-MS and GC-MS. In a subgroup of 10 subjects an euglycemic hyperinsulinemic clamp will be performed using [6,6- 2H2]glucose.

Thus, the lipogenic potential of fructose in humans will be compared with isocaloric amounts of glucose. Particularly, the question whether lipogenic effects are continuously dose dependent or whether there is a lipogenic shunting and if yes, at what level of ingested fructose will be addressed.

Conditions
Healthy
Being tested
Fructose

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • FructoseOther

    Subjects consume different amounts of fructose, glucose and sucrose in a crossover design

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. LDL size

    Measured: baseline and after each of 6 interventions

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted1 Dec 2009 (estimated)
  2. Study startJun 2007
  3. Primary completionMar 2011
  4. Study completionJul 2011

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Crossover
Masking
Single blind
Who is masked
Participant
Enrolment
36 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01021969
Sponsor's protocol ID
32003B-119706
Status last verified
Jul 2011
First submitted
25 Nov 2009
Last updated
19 Jul 2011
Results posted
No

Publications

  • Aeberli I, Hochuli M, Gerber PA, Sze L, Murer SB, Tappy L, Spinas GA, Berneis K. Moderate amounts of fructose consumption impair insulin sensitivity in healthy young men: a randomized controlled trial. Diabetes Care. 2013 Jan;36(1):150-6. doi: 10.2337/dc12-0540. Epub 2012 Aug 28.

    PubMed 22933433
  • Aeberli I, Gerber PA, Hochuli M, Kohler S, Haile SR, Gouni-Berthold I, Berthold HK, Spinas GA, Berneis K. Low to moderate sugar-sweetened beverage consumption impairs glucose and lipid metabolism and promotes inflammation in healthy young men: a randomized controlled trial. Am J Clin Nutr. 2011 Aug;94(2):479-85. doi: 10.3945/ajcn.111.013540. Epub 2011 Jun 15.

    PubMed 21677052

Questions about this trial

What is this clinical trial studying?

A study testing Fructose in people with Healthy, run by University of Zurich at 1 site in Switzerland.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 19 Jul 2011. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Switzerland. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

LDL size (time frame: baseline and after each of 6 interventions). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01021969, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Jul 2011.

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