An interventional study of Bacteriophages - MuniPhage and Bacteriophages - RenuPhage in Gastrointestinal Symptoms and Skin Quality, sponsored by Colorado State University. Recruiting at 1 site in United States. Open to participants aged 18 Years to 75 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-10-08.
Sponsored by Colorado State University · Not applicable, Interventional, and Supportive care
Bacteriophages are viruses that can selectively infect specific species and strains of bacteria. Some bacterial species in the human gut have been negatively associated with gut health and skin health. This study is designed to measure the efficacy of two different bacteriophage-based treatments for 4 weeks to improve gut and skin health. These treatments are bacteriophage that target specific strains of Escherichia coli and Staphylococcus Aureus.
Colorado State University is the lead sponsor of 117 studies on the registry; 19 are open to participants now.
Of its 5 completed or terminated interventional studies of FDA-regulated products, 3 (60%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
1 x 10E6 Plaque Forming Units (PFU) of bacteriophage strains PBH34, CAH57, BFX121, and DNK95 that have been designed to target specific pro-inflammatory E. coli strains in the gut.
Dietary Supplement: Bacteriophages - MuniPhage
Dietary supplement containing 1 x 10E6 PFU of phage strains LG91, BD117, CD007, and PD23 designed to target S. aureus in the gut which may also reduce S. aureus load on the skin.
Dietary Supplement: Bacteriophages - RenuPhage
Rice maltodextrin
Other: Placebo
1 x 106 Plaque Forming Units (PFU) of bacteriophage strains PBH34, CAH57, BFX121, and DNK95
Also known as: MuniPhage
1 x 106 PFU of phage strains LG91, BD117, CD007, and PD23
Also known as: RenuPhage
Rice maltodextrin
Gastrointestinal Symptom Rating Scale
The Gastrointestinal Symptom Rating Scale (GSRS) is a widely used tool for measuring gastrointestinal symptoms across five domains. The GSRS is scored between "No discomfort" and "Very severe discomfort"
Time frame: 4 weeks
Plan to share: No
No publications or documents are linked to this record.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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