Dietary intervention based on the Mediterranean diet for melanoma patients on immunotherapy

The Effect of Individualized Nutritive Intervention Based on the Mediterranean Diet on the Changes in the Gut Microbiome, Quality of Life, and Radiological and Biochemical Response to Immunotherapy in Metastatic Melanoma Patients

Not applicable Interventional University Hospital Rijeka · NCT06236360

This study is testing if following a Mediterranean diet can help melanoma patients on immunotherapy feel better and improve their treatment results.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment30 (estimated)
Ages18 Years and up
SexAll
SponsorUniversity Hospital Rijeka Academic / other
Drugs / interventionsimmunotherapy, prednisone
Locations1 site (Zagreb, Grad Zagreb)
Trial IDNCT06236360 on ClinicalTrials.gov

What this trial studies

This research investigates the impact of a Mediterranean diet on patients with metastatic melanoma who are receiving immunotherapy. Participants will be divided into two groups: one will maintain their usual diet while the other will receive dietary guidance from a nutritionist over a 12-week period. The study will assess changes in gut microbiome, quality of life, blood parameters, and radiological outcomes before and after the intervention. The goal is to explore whether dietary modifications can enhance the effectiveness of immunotherapy in these patients.

Who should consider this trial

Good fit: Ideal candidates include adults aged 18 and older with confirmed stage IV or inoperable stage IIIC cutaneous melanoma who are starting dual immunotherapy.

Not a fit: Patients with active brain metastases, uncontrolled autoimmune diseases, or significant psychiatric disorders may not benefit from this study.

Why it matters

Potential benefit: If successful, this intervention could improve treatment outcomes and quality of life for patients undergoing immunotherapy for metastatic melanoma.

How similar studies have performed: While dietary interventions in cancer treatment are being explored, this specific approach combining the Mediterranean diet with immunotherapy is relatively novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* age ≥18 years
* pathophysiologically confirmed cutaneous melanoma stage IV or inoperable stage IIIC,
* radiologically measurable disease on computerized tomography (CT) or positron emission tomography (PET)/CT,
* The multidisciplinary team recommended initiation of treatment with dual immunotherapy with anti-PD-1 + anti-CTLA4 immunotherapy
* written informed consent prior to participation
* willingness to monitor and adjust the dietary regimen if necessary
* Eastern Cooperative Oncology Group (ECOG) status 0-1.

Exclusion Criteria:

* lifetime history of psychiatric disorders
* active brain metastases
* active autoimmune disease
* systemic use of equal or more than 10 mg of prednisone or an appropriate corticosteroid equivalent during screening
* exposure to antibiotics and probiotics or other supplements that can affect the study outcome during screening within the last 3 weeks,
* uncontrolled diabetes
* history of clinically significant drug or alcohol abuse within the last 6 months
* specific dietary habits that are not inclined or able to change or the existence of food allergy or intolerance to certain food
* inability or refusal to participate in all research procedures

Where this trial is running

Zagreb, Grad Zagreb

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Melanoma Stage IvMetastatic Melanomamelanomaimmunotherapymetastasismediterranean diet
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.