Information on thyroid cancer and weight loss jabs.

January 5th, 2026

Information on thyroid cancer and weight loss jabs.

Information for Patients

What are GLP-1 agonists?

GLP-1 agonists are a type of medication used mainly to help people with Type 2 diabetes manage their blood sugar (glucose) levels. Some GLP-1 agonists can also be used to treat obesity. Most of these medicines are taken by injection.

Other names for this group of medicines include:

• Glucagon-like peptide-1 agonists

• GLP-1 receptor agonists

• Incretin mimetics

• GLP-1 analogs

Examples of currently available medications include: 

• Dulaglutide (Trulicity®)

• Exenatide (Byetta®)

• Liraglutide (Victoza®, Saxenda®)

• Lixisenatide (Adlyxin®)

• Semaglutide injection (Ozempic®, Wegovy®)

• Tirzepatide (Mounjaro®)

The first GLP-1 agonist (Exenatide) was approved by the U.S Food and Drug Administration (FDA) in 2005. Researchers are still studying other potential benefits of these medications. 

Do GLP-1 agonists affect the thyroid? 

When these medications were first developed, studies in animals suggested a possible link with a rare thyroid cancer (medullary thyroid cancer). Since then, several large studies have investigated their effects in human populations. Most recently, a large study of nearly 100,000 patients with diabetes treated with GLP-1 agonists did not show any increased risk of thyroid cancer in those treated with GLP-1 agonists, compared with people taking other diabetes medication. Although these studies are reassuring, there are currently no large studies reporting the effect of these medications in patients who have previously been treated for thyroid cancer. 

What does this mean for people with thyroid conditions? 

Differentiated Thyroid Cancer: 

This is the most common form of thyroid cancer and includes papillary, follicular and oncocytic subtypes. There is no evidence that GLP-1 agonists increase the risk of recurrence in patients with differentiated thyroid cancer. If your doctor thinks you are likely to benefit from these medications, the advantages of treatment usually outweigh any possible risks relating to your thyroid cancer.  ​

Medullary Thyroid Cancer:

This is a rare type of thyroid cancer which can sometimes run in families. Given previously raised concerns, it is generally recommended that patients with a history of medullary thyroid cancer, those with a family history Multiple Endocrine Neoplasia (MEN) type 2 and those with a known mutation in the RET gene, avoid GLP-1 agonists, unless there is a very strong medical reason to use them. 

Other Thyroid Conditions:

This includes patients with overactive or underactive thyroid glands, benign nodules or goitres. GLP-1 agonists are considered safe in these patient groups and can be used without concern. 

Summary:

GLP-1 agonists are safe and effective for most people, including those with common thyroid problems. If you have a history of thyroid cancer, especially medullary thyroid cancer, discuss the risks and benefits carefully with your doctor before starting treatment.

We are delighted to advise that our latest film about having thyroid cancer as a teenager has been nominated from a Smiley Charity Film Award! 

December 11th, 2025

We are delighted to advise that our latest film about having thyroid cancer as a teenager has been nominated from a Smiley Charity Film Award! 

Please vote for us to see these young people with our rare disease get the recognition they deserve. Thank you! 

You can vote for Molly ‘s film here: https://smileycharityfilmawards.com/films/my-thyroid-and-me-a-young-persons-cancer-story

‘Worst part of thyroid cancer treatment’ no longer needed, says top Newcastle doctor after huge trial

July 8th, 2025

‘Worst part of thyroid cancer treatment’ no longer needed, says top Newcastle doctor after huge trial

Research published in the Lancet highlights that iodine radiation is now longer necessary in thyroid cancer care

Read the full article here.

My Thyroid and Me

February 4th, 2025

We are delighted to share our latest patient information film with you: Molly, my thyroid and me, a young persons cancer story.

Our film will address the gap in patient information for teenagers and young people with thyroid cancer.

Miss Alison Waghorn, Consultant Thyroid Cancer Surgeon and President of BAETS says:

Thank you for letting us know about your new film. I have watched it from start to finish.  It is very useful and extremely professional.

I sure it will help many parents and young adolescents understand the thyroid cancer pathway.

I am very happy for BAETS to endorse this .

Prof Jon Wadsley, Consultant Clinical Oncologist says:

The film is amazing .Im sure it will be of great help to families with teenage children facing a thyroid cancer diagnosis in the future.

Bethan Jones Consultant ENT Surgeon says:

Thyroid cancer can also affect chi land young adults.

Thank you Butterfly Thyroid Cancer Trust for this fantastic film and to Molly and her Mum for sharing her story.

Are you receiving treatment for Thyroid Cancer in Scotland?

April 16th, 2024

Are you receiving treatment for Thyroid Cancer in Scotland?

Please complete our joint survey with the BTF, we need as many responses as possible please which will be fed back to the Scottish Thyroid  Cancer Network to help identify any gaps in care.

Many thanks! 

https://www.btf-thyroid.org/news/thyroid-cancer-survey-for-scottish-patients