NCT07105670 · Indiana University
Effects of Replacing High Protein Foods in People With Chronic Kidney Disease
What this study is about
The goal of this crossover clinical trial is to explore the effects of red meat intake on serum and fractional urinary excretion of uremic toxins including trimethylamine N-oxide in people with chronic kidney disease.
View original scientific description
The goal of this crossover clinical trial is to explore the effects of red meat intake on serum and fractional urinary excretion of uremic toxins including trimethylamine N-oxide in people with chronic kidney disease.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Age 40-70 years
- Male or postmenopausal female
- Stage 3 CKD (eGFR between 30-59ml/min/1.73m\^2 by the CKD-EPI equation (without race correction)).
- If eGFR is greater than or equal to 45ml/min/1.73m\^2 then albuminuria must be greater than 300mg/g creatinine by spot urine.
- Willing to consume controlled diet for duration of the study
- Willing to collect fecal samples at home
Exclusion criteria
- Hemoglobin A1c greater than 7% within previous six months
- Treatment with metformin or insulin within previous three months
- Blood pressure greater than 150/100 mmHg from chart of home on at least two occasions in prior month (can be inclusive of screening visit)
- Change in cardiovascular and/or hypertension medication in the last 30 days
- History of major gastrointestinal disease (e.g. inflammatory bowel disease, uncontrolled irritable bowel syndrome, C. difficile chronic infection, celiac disease, diverticulitis, stomach or duodenal ulcers)
- Known HIV disease
- Hospitalization in the last two months
- Significant recent unintentional weight loss (5% of weight over past three months)
- Cancer or received cancer treatment in the last year (except basal cell carcinoma)
- Prior bariatric surgery (i.e. gastric bypass, sleeve gastrectomy) or restrictive bariatric surgery (i.e. adjustable gastric band)
- Treatment with immunosuppressive medications in the past six months or more than one week of treatment with prednisone greater than 10mg per day in the past three months (or equivalent steroid dose of non-prednisone steroids)
- Recent antibiotic use defined as a single course of antibiotics within the past three months or two or more courses within the past six months
- Known food allergy that would influence the ability to consume the study diets
- History of hyperkalemia defined as greater than 5.5mmol/L on at least two occasions
- Other medical conditions or concerns at the discretion of the investigators
Where
- West Lafayette, Indiana
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 4, 2026 · Source of record for eligibility and locations