Iodine uptake in thyroid cancer patients after a low iodine diet

The Uptake of Radioactive Iodine Before and After a Low Iodine Diet in Patients With Differentiated Thyroid Carcinoma

Not applicable Interventional University Medical Center Groningen · NCT05599139

This study is testing whether a low iodine diet for 7 days can help improve how well radioactive iodine is taken up by the thyroid in patients with thyroid cancer who are getting ready for treatment.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment25 (estimated)
Ages18 Years to 75 Years
SexAll
SponsorUniversity Medical Center Groningen Academic / other
Drugs / interventionsradiation
Locations1 site (Groningen, Provincie Groningen)
Trial IDNCT05599139 on ClinicalTrials.gov

What this trial studies

This clinical trial aims to evaluate the difference in thyroid uptake of low dose radioactive iodine in patients with differentiated thyroid carcinoma before and after following a low iodine diet for 7 days. The study will measure iodine uptake in athyreotic patients who have undergone total thyroidectomy and are preparing for ablation therapy. By comparing the uptake percentages before and after the diet, researchers hope to gather prospective data on the effectiveness of the low iodine diet in enhancing iodine uptake during treatment.

Who should consider this trial

Good fit: Ideal candidates are adults over 18 diagnosed with differentiated thyroid carcinoma who can adhere to a low iodine diet.

Not a fit: Patients under 18, those with renal impairment, or those who have recently used iodinated contrast or are pregnant may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could improve the effectiveness of radioactive iodine therapy in patients with differentiated thyroid cancer.

How similar studies have performed: While there is limited prospective data on this approach, previous studies have shown mixed results regarding the effectiveness of low iodine diets in enhancing iodine uptake.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients, men and women above the age of 18 years, have to be diagnosed with DTC and have to follow a LID prior to the 131I ablation therapy according to the Dutch DTC guideline
* Patients have to be fit to adhere to the study protocol
* Patients have to be able to read and understand the Dutch language

Exclusion Criteria:

* Age \< 18 years
* Patients using amiodarone
* Patients receiving iodinated contrast \< 3 months before the LID
* Pregnancy
* Patients prepared for ablation therapy with rhTSH
* Renal impairment, EGFR \<30ml/min/1,73m2

Where this trial is running

Groningen, Provincie Groningen

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 Differentiated Thyroid CancerLow iodine dietIodine uptake
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.