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A Fermented and Fiber-Rich Microbiome-Targeted Diet Intervention Study in Patients Receiving Immune Checkpoint Inhibitors or Undergoing Autologous Stem Cell Transplantation

A Fermented and Fiber-Rich Microbiome-Targeted Diet Intervention Study in Patients Receiving Immune Checkpoint Inhibitors or Undergoing Autologous Stem Cell Transplantation - FERMI DIET

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
DRKS
Registry ID
DRKS00039126
Enrollment
60
Registered
2026-01-29
Start date
2026-03-09
Completion date
Unknown
Last updated
2026-03-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cancer patients after ICI treatment or after autologous stem cell transplantation

Interventions

Group 1: First visit to the clinic (day 0): - Blood sample (approx. 22 ml) - Stool sample - 4 short questionnaires on quality of life and gastrointestinal complaints Introduction to the planned chang

Sponsors

Universitätsmedizin Frankfurt
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Inclusion criteria

Inclusion criteria: o Body Mass Index 18.5–40 kg/m2 o ECOG performance status of 0-1 o German or English-speaking o Ability to give inform consent o Self-reported willingness to comply with dietary modification o Self-reported willingness to comply with scheduled visits, provide blood and stool samples o Self-reported willingness to fill out study required questionnaires o Currently under treatment with ICI

Exclusion criteria

Exclusion criteria: o Major gastrointestinal surgery (not including appendectomy or cholecystectomy) within 3 months of enrollment o History of total colectomy or bariatric surgery o Medical contraindications to intervention as determined by the treating physician o Heavy drinker (defined as > 14 drinks per week) or current self-reported illicit drug use o Uncontrolled psychiatric illness/social situations that would limit compliance with study requirements. o Plan for travel or any other activity during the study that would preclude adherence to prescribed diets o Current consumption of fiber =20g or fermented food =3 portions a day. o History of active uncontrolled gastrointestinal disorders or diseases, including: - Inflammatory bowel disease (IBD), including ulcerative colitis (mild-moderate-severe), Crohn's disease (mild-moderate-severe), or indeterminate colitis. - Irritable bowel syndrome (IBS) (moderate-severe). - Malabsorption (e.g active celiac disease) - Persistent, infectious gastroenteritis, colitis or gastritis, persistent or chronic diarrhea of unknown etiology, Clostridium difficile infection (recurrent), or Helicobacter pylori infection (untreated) o Regularly taking probiotics, fiber supplements, or any other medication or pre-biotic dietary supplement that could affect the study outcome as determined by the principal investigator and unable/unwilling to discontinue for the study. These agents must be discontinued at least 14 days prior to the start of the diet.

Design outcomes

Primary

MeasureTime frame
To determine the feasibility and safety of a combined high-fermented food and high- fiber diet This will be checked at different timepoints via stool sample analysis and questionnaire feedback

Secondary

MeasureTime frame
- To assess the effect of a high-fermented food and high- fiber diet on the composition and diversity of the gut microbiome - To assess the effect of a high-fermented food and high- fiber diet on the metabolic output of the gut microbiome - To assess the effect of a high-fermented and high- fiber diet on the quality of life and psychological symptoms This will be checked at different timepoints via stool sample analysis and questionnaire feedback

Countries

Germany

Contacts

Public ContactTheresa Alisch

Universitätsmedizin Frankfurt

th.alisch@med.uni-frankfurt.de+49 69 6301 5452

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Apr 4, 2026