Scientists hunt for diet clues in blood and urine
NCT ID NCT06656338
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked for substances in blood and urine that can show what a person has eaten, instead of relying on memory or food diaries. Thirty-two healthy adults ate specially prepared meals for a week, and researchers tested their blood, urine, and stool samples. The goal was to find better ways to measure diet, not to treat any disease.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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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
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32 people
The number who actually took part.
- Started
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Mar 2025
- Finished
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Feb 2026
- Lead sponsor
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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
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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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: * Healthy adults; * Age 18 years or older; * Willing to come to the Fred Hutch campus 10 times during the study; BMI 18.5-39.9 kg/m2 Exclusion criteria: * Pregnancy or lactation; * allergy or aversion to any of the foods that will be studied and/or provided; * history of gastrointestinal disorders including ulcerative colitis, Crohn's disease, celiac sprue, hereditary non-polyposis colorectal cancer (HNPCC), familial adenomatous polyposis, pancreatic disease, or liver disease; * previous gastrointestinal resection or bariatric surgery; * bleeding disorders that precludes blood draws; * recent hospital admissions (past 6 months) for heart disease (MI/CVA or CHF) or other CVD/CAD conditions under physician guided therapy that is not medically stable; * cancer under radiation or chemotherapy treatment that is active or within 6 months of treatment; * weight change (±5% in the last 3 months); * regular alcohol intake of \> 2 drinks/day (equivalent to 720 mL of beer, 240 mL of wine, or 90 mL of spirits), and unwilling to abstain during feeding periods; * use of tobacco and/or marijuana, hookahs, e-cigarettes (e-cigs, vapes, etc) and not willing to abstain during feeding periods; * use of illicit drugs and not willing to abstain during feeding periods; * BMI ≥40 kg/m2; regular (daily to weekly) use of over-the-counter (OTC) weight-loss aids or anti-inflammatories, and unwilling or unable to stop taking these during feeding periods; * unwilling to stop taking OTC dietary supplements that interfere with the test foods being studied including pills, chewables, liquids or powders for the following: protein supplements, soy, fiber, flaxseed, fish oil (including cod liver oil), probiotics, carotenoids, selenium, other antioxidants, other phytochemicals, glucosamine and chondroitin (if vitamin supplement is MD prescribed - may continue); * oral or IV antibiotic use in the past 6 months (could defer participation until 6 months post-completion of course of antibiotics); * seated blood pressure \>140/90 mmHg; fasting clinical lab tests outside acceptable values as ascertained at the screening blood draw (see Table 2 in protocol document); * current use of specific prescription medication(s) (see Table 3 in protocol document); and * inability to freely give informed consent.
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Genom att skicka in godkänner du våra Användarvillkor
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Fred Hutchinson Cancer Center
Seattle, Washington, 98109, United States
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