Hashimoto’s and Gluten: What Does the Research Show?
Should Everyone with Hashimoto’s Avoid Gluten?
One of the most common questions I hear from patients with Hashimoto’s thyroiditis is:
“Do I need to stop eating gluten?”
The answer is not as simple as a yes or no.
Some people with Hashimoto’s report significant improvements in energy, digestion, brain fog, bloating, and thyroid-related symptoms after removing gluten from their diet. Others notice little or no difference.
So what does the scientific research actually show?
Let’s explore the evidence.
What Is Hashimoto’s Thyroiditis?
Hashimoto’s thyroiditis is the most common cause of hypothyroidism in many parts of the world. It is an autoimmune condition in which the immune system attacks the thyroid gland.
Common symptoms include:
Fatigue
Weight gain
Constipation
Depression
Brain fog
Hair loss
Dry skin
Cold intolerance
Elevated thyroid antibodies
Many patients also experience digestive complaints, food sensitivities, and other autoimmune conditions.
What Is Gluten?
Gluten is a protein found in:
Wheat
Barley
Rye
It helps give bread and baked goods their texture and elasticity.
For most people, gluten can be consumed without major issues. However, certain individuals may react differently.
The Strongest Evidence: Celiac Disease and Hashimoto’s
Research has consistently shown that people with Hashimoto’s thyroiditis have a higher risk of celiac disease compared to the general population.
Celiac disease is an autoimmune condition in which gluten triggers damage to the small intestine.
Studies suggest that celiac disease occurs several times more frequently in patients with autoimmune thyroid disease.
This is why many experts recommend screening for celiac disease in selected patients with Hashimoto’s, particularly when digestive symptoms, anemia, nutrient deficiencies, or a family history are present.
Can Gluten Affect People Without Celiac Disease?
This is where the discussion becomes more complex.
Some individuals appear to experience symptoms after consuming gluten despite testing negative for celiac disease. This has been referred to as non-celiac gluten sensitivity.
Symptoms may include:
Bloating
Abdominal discomfort
Fatigue
Brain fog
Headaches
Joint pain
However, diagnosing non-celiac gluten sensitivity remains challenging because there is currently no definitive laboratory test.
Gluten and Thyroid Antibodies
Several studies have investigated whether a gluten-free diet may reduce thyroid antibody levels in patients with Hashimoto’s.
Some research has demonstrated reductions in thyroid antibody levels and improvements in inflammatory markers among certain individuals following a gluten-free diet.
However, not all studies have shown consistent results, and current evidence does not support recommending a gluten-free diet for every person with Hashimoto’s.
The response appears to vary significantly between individuals.
Why Might Some Patients Improve?
Several explanations have been proposed:
Improved Gut Health
Removing gluten may reduce digestive symptoms in sensitive individuals and improve intestinal barrier function.
Reduced Immune Activation
For some people, reducing exposure to foods that trigger immune responses may support immune balance.
Healthier Dietary Choices
Many individuals who adopt a gluten-free diet also increase their intake of whole foods, vegetables, and nutrient-dense meals while reducing processed foods.
These dietary improvements may contribute to symptom improvement independently of gluten removal itself.
Who Might Consider a Gluten-Free Trial?
A supervised gluten-free trial may be worth discussing with your healthcare provider if you have:
Hashimoto’s thyroiditis
Positive celiac disease testing
Significant digestive symptoms
Unexplained bloating
Chronic diarrhea or constipation
Iron deficiency
Multiple autoimmune conditions
Persistent symptoms despite treatment
A Functional Medicine Perspective
In functional medicine, the goal is not to remove foods unnecessarily.
Instead, we aim to identify whether a particular food may be contributing to symptoms or immune activation in a specific individual.
For some patients, gluten elimination may be a valuable part of a comprehensive plan. For others, the primary issue may involve gut infections, nutrient deficiencies, stress, sleep disruption, or other factors.
Patient Experience
In my clinical practice, I have seen patients with Hashimoto’s thyroiditis experience meaningful improvements after individualized nutrition and gut health programs.
One young woman with Hashimoto’s hypothyroidism had a TSH level of 9.86. After implementing an elimination diet and a targeted gut support protocol, her TSH improved to 2.76.
Another patient with elevated Anti-Thyroglobulin Antibodies experienced a reduction from 226 to 26 after following a personalized nutrition and lifestyle program.
Individual results vary, and no specific outcome can be guaranteed.
Key Takeaway
Current research does not support the idea that everyone with Hashimoto’s must avoid gluten.
However, evidence suggests that gluten may play a role in some individuals, particularly those with celiac disease, non-celiac gluten sensitivity, digestive symptoms, or multiple autoimmune conditions.
The most effective approach is often a personalized one that considers the individual’s symptoms, medical history, laboratory findings, and overall health.
Looking for Personalized Support?
I provide online Functional and Holistic Medicine consultations for patients worldwide.
If you have Hashimoto’s thyroiditis, elevated thyroid antibodies, hypothyroidism, digestive symptoms, or chronic health concerns, I would be happy to discuss whether a functional medicine approach may be appropriate for you.
Dr. Samar Shadly, MD, IFMCP
Functional & Holistic Medicine
Complimentary 15-minute discovery call available for new patients.