Fasting to Treat Long Covid in Adults

Pilot Study on the Feasibility of an RCT: Evaluating Periodic Fasting as a Treatment Strategy for Long Covid in Adults

Not applicable Interventional University of Luxembourg · NCT06522750

This study is testing if a week of fasting can help adults with long COVID feel better by reducing inflammation and improving their health.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment20 (estimated)
Ages18 Years to 64 Years
SexAll
SponsorUniversity of Luxembourg Academic / other
Locations1 site (Ettelbruck)
Trial IDNCT06522750 on ClinicalTrials.gov

What this trial studies

This pilot study investigates the feasibility of a 7-day ambulatory fasting intervention using the Buchinger-Wilhelmi method for adults suffering from long COVID. The study aims to assess how fasting may modulate immune responses and improve health outcomes in patients experiencing persistent symptoms following COVID-19 infection. By focusing on chronic inflammation associated with long COVID, the research seeks to explore the potential therapeutic benefits of caloric restriction on symptom relief and overall well-being.

Who should consider this trial

Good fit: Ideal candidates for this study are adults aged 18-64 who have been diagnosed with long COVID syndrome and have a normal body mass index.

Not a fit: Patients with severe internal diseases, current eating disorders, or those who are underweight may not benefit from this study.

Why it matters

Potential benefit: If successful, this intervention could provide a novel dietary approach to alleviate long COVID symptoms and improve patients' quality of life.

How similar studies have performed: While dietary interventions like fasting have shown promise in other conditions, this specific approach for long COVID is novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age 18-64
* Diagnosis Long Covid Syndrome (post-acute COVID-19 symptoms persisting ≥12 weeks)
* Normal body Mass Index (18.5 to 25 kg/m2)
* Marginal Iron status ( PF\< 25 ng/ml)
* Able to communicate in and comprehend English and/or German and/or French language
* Present written / signed declaration of consent
* Ability to understand the patient information and willingness to sign the consent form
* Consent to specimen collection and specimen use

Exclusion Criteria:

* Current underweight condition (body mass index less than 18.5 kg/m2) or weight loss exceeding 3 kg within the last month or 5 kg within the last three months.
* Existing / current eating disorder within the past five years (e.g., anorexia, bulimia).
* Psychiatric condition that limits understanding of the examination protocol (unable to consent)
* Severe internal disease (e.g. kidney deficiency with creatinine \> 2mg/dl), chronic inflammatory illness other than LCS
* Participation in another intervention study.
* Existing vegan diet or fasting during the last six months
* Pregnancy or breastfeeding status.
* Presence or suspicion of pre-existing ME/CFS or early autonomous dysfunction
* Diagnosis of chronic inflammatory bowel diseases, celiac disease or colorectal cancer according to the guidelines of the German Society of Gastroenterology
* Use of anti-psychotic drugs
* Antibiotic use during the previous 12 months
* Start of novel drug therapy
* Contraindication for additional blood draws (e.g. hemoglobin \<10)

Where this trial is running

Ettelbruck

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 Long CovidChronic Inflammationlong covidfastingcaloric restrictionchronic inflammationdysbiosismitochondrial dysfunction
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.