Daily almonds may tame gut inflammation in metabolic syndrome
NCT ID NCT05790564
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether eating almonds every day for 12 weeks can improve gut health and lower inflammation in people with metabolic syndrome. About 80 adults aged 35-60 with conditions like high blood pressure, high blood sugar, or unhealthy cholesterol levels will participate. Researchers will measure changes in gut barrier function, inflammation markers, and heart health.
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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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About 80 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Nov 2022
- Expected to finish
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Jul 2027
An estimate. End dates often move.
- 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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35 to 60 years
- 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: * Age 35-60 years * 3 or more of the following: hypertension (systolic BP 130-179 mmHg or diastolic BP 85-119 mmHg); hyperglycemia (fasting glucose 100-599 mg/dL); central obesity \[waist circumference greater than 40.1 inches (M) or 34.6 inches (F); hypertriglyceridemia (150-499 mg/dL); low HDL \[lower than 40 mg/dL (M) or 50 mg/dL (F)\] * Willing to restrict consumption of nuts other than study nuts for 1 week prior to and throughout the study (13 weeks) * Willing to stop probiotic supplements one week prior to and during the study (13 weeks) * Willing to stop multivitamins and supplements containing vitamin E, magnesium, calcium, iron, zinc and copper one week prior to and during the study (13 weeks) * Willing to complete intake diaries during the study * Willing to maintain current eating patterns (no significant diet change during study) Exclusion Criteria: * Weekly consumption of almonds, hazelnuts, peanuts and sunflower seeds combined greater than 2 servings (about 2 oz) in the past 3 months * Nut, wheat, or gluten allergy/intolerance * Regular use of vitamin E supplements * Consume more than 2 alcoholic drinks daily * Tobacco use, including e-cigarettes, or smoking of any substance (e.g. cannabis) in the past 3 months * Pregnancy, breastfeeding, or planning to become pregnant before completing the study * Vigorous exercise greater than 7 hours/week * History of cardiovascular disease, liver disease or cancer * Have had bariatric surgery (e.g. gastric bypass, gastric banding, sleeve gastrectomy, etc.), other gastrointestinal procedures (e.g. cholecystectomy), disorders (e.g. Crohn's disease, celiac disease, ulcerative colitis) or chronic diarrhea * Diagnosis of hemochromatosis * Chronic use (daily intake in past 30 days) of anti-inflammatory medication (steroid or NSAID) * Use of ezetimibe or orlistat * Use of oral antibiotic medication within the past month * Body Mass Index (BMI) \<25.0 or \>35.0 kg/m2 * Regular use of multivitamin supplements in the past 3 months * Physician prescribed use of probiotic, vitamin E, magnesium, calcium, iron, zinc or copper supplements
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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
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Oregon State University
Corvallis, Oregon, 97331, United States
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Other studies related to the condition(s) this trial covers.
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