Fructose study aims to uncover hidden link to prediabetes
NCT ID NCT04168372
First seen Jun 27, 2026 · Last updated Jul 10, 2026 · Updated 1 time
Summary
This study looks at how fructose in meals influences fat production and blood sugar levels in people with prediabetes or insulin resistance. Researchers will give participants special labeled fructose or pyruvate in liquid meals to track these processes. The goal is to better understand the mechanisms behind fructose's role in metabolic issues.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- fructose
- What this could lead to
- If successful, this could help explain how fructose contributes to prediabetes and insulin resistance, pointing toward dietary recommendations.
- What could go wrong
- This is a small, early-stage observational study with only 35 participants, so results may not apply broadly. It measures biological markers, not health outcomes.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
-
35 people
The number who actually took part.
- Started
-
Sep 2019
- Expected to finish
-
Jul 2027
An estimate. End dates often move.
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
20 to 55 years
- Sex
-
Anyone
- Healthy volunteers
-
Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Body Mass Index 22 to 35 kg/m2 * Prediabetic (HbA1c 5.7% to 6.5%) or hyperinsulinemic (fasting insulin ≥12 µIU/mL) but non-diabetic (fasting glucose \<126mg/dL and HbA1c \< 6.5%) ; or normal control (fasting insulin \<10 µIU/mL, fasting glucose \<100 mg/dL, and HbA1c \< 5.7%) Exclusion Criteria: * Pregnancy or lactation within the past six months * Type 1 or 2 diabetes mellitus * History of liver disease or aspartate aminotransferase (AST) and alanine aminotransferase (ALT) 2x the upper limit of normal (ULN); * Fasting triglyceride or total cholesterol levels above 95th percentile for age and sex; * Hemoglobin or hematocrit below the lower limit of normal for sex; * Report of hepatitis or HIV infection; * History of cancer, use of any anti-diabetic medications or hypolipidemic agents in the past six months; * History of surgical procedure for obesity; * Self-reported change in body weight \>5% in the past six months; * History of other conditions known to affect insulin sensitivity and lipid metabolism; * Known intolerance to acetaminophen or components of the liquid test meals.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Touro University California
Vallejo, California, 94592, United States
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