Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Ketogenic diet and ketone ester to reduce arm lymphedema

Official title: Nutritional Ketosis: a Novel Metabolic Strategy to Treat Lymphedema Patients?

Run by Universitaire Ziekenhuizen KU Leuven · NCT03991897 · Data updated 2026-11-12

This trial will test whether a ketogenic diet, with or without ketone ester supplements, can reduce swelling in adults with recent unilateral arm lymphedema after lymph node removal.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment81 (estimated)
SponsorUniversitaire Ziekenhuizen KU Leuven
Academic / other
Locations1 site (Leuven)
StatusRecruiting
StartedOctober 1, 2025
Main results expectedFebruary 1, 2028
Study endsAugust 1, 2028
Registry record updatedDecember 3, 2025
Trial IDNCT03991897 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults over 18 with unilateral arm lymphedema onset within the past year, defined as >3% volume difference and stage 1–2b after lymph node dissection, who can consent and understand Dutch.

Probably not a fit

Patients with active cancer, pregnancy or breastfeeding, edema from other causes or later-stage disease than specified, major organ failure, significant gastrointestinal intolerance, or inability to adhere to the diet are unlikely to benefit or be eligible.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Participants with early unilateral arm lymphedema will be randomized to a ketogenic diet or an isocaloric control diet, and some groups will receive ketone ester supplementation, to induce nutritional ketosis and compare outcomes. The study will measure limb volume differences, dermal backflow and markers of lymphatic transport to determine changes in edema and function. Eligible participants are adults with stage 1 to 2b lymphedema that started within one year after lymph node dissection and who can give informed consent in Dutch. The trial is motivated by mouse proof-of-concept data showing reduced edema and improved lymphatic transport under ketogenic conditions.

Why it matters

Potential benefit: If successful, inducing nutritional ketosis could reduce limb swelling, improve lymphatic transport, and enhance quality of life for people with early post-surgical arm lymphedema.

How similar studies have gone: Preclinical mouse studies from the investigators' lab showed reduced edema and improved lymphatic transport with a ketogenic diet, but human data on ketosis for lymphedema are currently limited.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* \>18 years;
* unilateral lymphedema of the arm lymph node dissection
* lymphedema onset less than a year before the therapy starts
* lymphedema defined as \>3% volume difference between both arms
* lymphedema stage 1, stage 2a or stage 2b
* absence of pregnancy at the time of enrollment and willingness to use adequate contraceptive measures until the end of the study;
* oral and written approval of the informed consent presented at the time of the consultation by the physicians;
* understanding Dutch

Exclusion Criteria:

* \<18 years;
* edema of the limb with different etiology or later stage/onset as specified in the inclusion criteria;
* presence of active cancer
* pregnancy or active breastfeeding;
* impossibility to participate for the entire study period;
* mentally or physically unable to participate to the study;
* presence of gastrointestinal intolerance or other serious illness (e.g. renal failure, hepatic dysfunction, heart failure, neurological impairment);
* presence of diabetes or other metabolic disease;
* contra-indication for the use of indocyanine green (ICG): allergy to ICG or iodine, hyperthyroidism.

Where it's running

  • UZ Leuven
    Leuven, Belgium
    Recruiting

Study contacts

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.