Clinical trial Recruiting at 1 site Interventional Ages 19 to 59

Stable isotope tracing in adults with obesity

Official title: Assessing Metabolic Health With Stable Isotope Tracer Techniques in Adults With Obesity

Run by University of Illinois at Urbana-Champaign · NCT07020741 · Data updated 2026-11-12

This research will test whether drinks labeled with safe stable isotopes can show how adults with obesity process glucose and protein.

Quick facts

Study typeInterventional
Ages19 Years to 59 Years
SexAll
Enrollment8 (estimated)
SponsorUniversity of Illinois at Urbana-Champaign
Academic / other
Locations1 site (Urbana, Illinois)
StatusRecruiting
StartedSeptember 12, 2025
Main results expectedAugust 30, 2026
Study endsDecember 31, 2026
Registry record updatedApril 29, 2026
Trial IDNCT07020741 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults aged 19–59 with BMI ≥30 kg/m2 (waist ≥102 cm for men or ≥88 cm for women) who report low leisure-time activity and have no known metabolic disease are ideal candidates.

Probably not a fit

People who smoke, are regularly physically active, are pregnant or become pregnant, have known metabolic diseases, recent large weight changes, food allergies, or are non-eumenorrheic or on hormonal birth control are excluded and unlikely to benefit from participation.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a small crossover metabolic study in eight adults with obesity using stable isotope–labeled oral drinks to trace glucose and amino acid handling. In one arm participants consume six hourly caloric drinks containing two stable isotopes with repeated blood, breath, urine sampling and muscle biopsies. In the other arm participants drink a single 75 g glucose drink labeled with two glucose isotopes and provide serial blood and breath samples over three hours. Initial consent and screening questionnaires are completed virtually and eligible participants (ages 19–59, BMI ≥30 kg/m2, low habitual activity) attend on-site visits at the University of Illinois for fasting tests and biopsies.

Why it matters

Potential benefit: If successful, this could improve understanding of how glucose and protein are processed in obesity and help guide better dietary or therapeutic strategies.

How similar studies have gone: Stable-isotope tracing is an established research method that has been used successfully to measure glucose and amino acid metabolism, although this specific small crossover application in obese adults is fairly limited.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* ages 19-59
* Obese \>/= 30 kg/m\^2 and \>/= 102 cm for males and \>/= 88 cm for females
* Godin Leisure-time or exercise questionnaire \<14 units

Exclusion Criteria:

1. Pregnant or become pregnant
2. Any known food allergies
3. Smoker
4. Are physically active
5. Have any known metabolic diseases
6. Have been weight unstable within the last 6 months (lost or gained \>10% of body mass)
7. Non eumenorrheic or on a hormonal birth control

Where it's running

  • Freer Hall - University of Illinois
    Urbana, Illinois, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.