As a nutritionist, I often meet people who feel like their body is working against them. This is especially true for those with Hashimoto’s thyroiditis. It’s a condition where your immune system mistakenly attacks your thyroid gland, causing it to slow down your body’s metabolism. Today, let’s talk about how common this condition is, both worldwide and here in Australia, and how smart food choices can make a big difference.
What Causes Hashimoto’s?
While the exact cause of Hashimoto’s isn’t always clear, it’s generally thought to be a combination of your genes and environmental triggers. Some common factors include:
• Genetics: Having a family history of thyroid or other autoimmune diseases increases your risk.
• Hormones: Because it affects women so much more often, sex hormones likely play a role.
• Environmental Triggers: Exposure to excessive radiation, certain medications, high levels of iodine, or chronic stress can sometimes trigger the condition.
The Epstein-Barr Virus (EBV) Connection
One of the most interesting areas of recent research is the link between viral infections and Hashimoto’s. Specifically, the Epstein-Barr Virus (EBV)—the virus that causes “mono”—has been found in the thyroid glands of many people with Hashimoto’s [8].
While EBV is very common, in some people, the virus can “hide” in the thyroid and trigger the immune system to attack. This happens through a process called molecular mimicry, where the immune system confuses the virus with your own thyroid cells [9]. Addressing underlying viral loads and supporting your immune system is often a key part of a holistic approach to Hashimoto’s.
Hashimoto’s: A Common Condition
Hashimoto’s is actually quite common. It’s one of the most widespread autoimmune diseases globally.
• Around the World: About 7.5% of adults worldwide have Hashimoto’s [1]. In some areas, this number can be even higher, reaching up to 10–12% [2].
• In Australia: Thyroid problems are a big health concern here. It’s thought that over 1 million Australians might have an undiagnosed thyroid condition. About 0.5% of people have clear hypothyroidism (an underactive thyroid), and up to 5% have subclinical hypothyroidism, which can be an early sign of Hashimoto’s [3].
• More Common in Women: Hashimoto’s affects women much more often than men, with women being 7 to 10 times more likely to develop it [4].
How Nutrition Can Be Your Ally
While medication is often needed to help your thyroid, what you eat plays a huge role in calming your immune system and supporting your thyroid health.
1. Key Nutrients Your Thyroid Needs
Your thyroid gland relies on specific vitamins and minerals to work properly. Making sure you get enough of these is crucial:
• Selenium: This mineral helps reduce the immune attack on your thyroid and protects it from damage [5]. You can find it in foods like Brazil nuts, sardines, eggs, and sunflower seeds.
• Zinc: Essential for making thyroid hormones and converting them into their active form [6]. Good sources include oysters, beef, pumpkin seeds, and lentils.
• Iron: Your body needs iron to produce thyroid hormones. Many people with Hashimoto’s are low in iron [6]. Red meat, spinach, quinoa, and tofu are great sources.
• Vitamin D: This vitamin is vital for a healthy immune system. Low Vitamin D levels are often seen in people with autoimmune thyroid conditions [6]. Get it from sunlight, fatty fish, and egg yolks.
2. Calming Inflammation and Healing Your Gut
Many people with Hashimoto’s also experience gut issues. Taking care of your gut can significantly impact your thyroid health.
• Consider Gluten and Dairy: Some studies suggest that avoiding gluten and/or lactose (found in dairy) can help reduce thyroid antibodies and improve how your body absorbs thyroid hormones, especially if you’re sensitive to these foods [7].
• Eat Anti-Inflammatory Foods: Focus on foods rich in antioxidants, like berries and leafy greens, and omega-3 fatty acids, found in fatty fish and walnuts. These foods help reduce the inflammation that comes with autoimmune conditions [6].
3. Understanding Goitrogens (Foods like Broccoli and Kale)
Many people worry about foods like broccoli, kale, and cabbage, which contain compounds called goitrogens. These can interfere with iodine uptake if eaten in very large, raw amounts. However, cooking these vegetables greatly reduces their goitrogenic effect. For most people, the health benefits of these nutrient-packed foods far outweigh any potential risks.
Simple Steps for Your Hashimoto’s Journey
If you have Hashimoto’s, here are three easy nutritional steps to get started:
- Get Tested: Work with your doctor or nutritionist to check your levels of Vitamin D, Iron, and Selenium before taking high-dose supplements.
- Eat Real, Whole Foods: Fill your plate with a variety of colorful vegetables and high-quality proteins. These provide the essential building blocks your thyroid needs.
- Listen to Your Body: Pay attention to how you feel after eating certain foods. If you notice bloating or fatigue after having gluten or dairy, it might be worth trying to remove them from your diet for a while to see if it helps.
Your Path to Better Health Starts Now
Hashimoto’s is common, but your journey to managing it is unique. By combining your medical treatment with smart, targeted nutrition, you can support your immune system, boost your energy, and feel better overall.
A Personal Note from Your Nutritionist
I want to share a personal story that truly highlights the power of diet and lifestyle. I was diagnosed with Hashimoto’s myself, and through dedicated dietary changes and lifestyle adjustments, I was able to manage my condition without medication. My thyroid antibodies significantly decreased, and my TSH levels stabilized to a healthy 1.5. This personal experience fuels my passion for helping others discover their own path to metabolic health and well-being. It’s a testament to how much control we can have over our health when we make informed choices.
References
- Hu, X., et al. (2022). Global prevalence and epidemiological trends of Hashimoto’s thyroiditis in adults: A systematic review and meta-analysis.
https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2022.1020709/full - Morasiewicz-Jeziorek, J., et al. (2026). The Role of Dietary Interventions in Hashimoto’s Thyroiditis. Nutrition Reviews.
https://academic.oup.com/nutritionreviews/advance-article/doi/10.1093/nutrit/nuaf195/8416312 - Zuzek, R., et al. (2025). Differentiating Hashimoto’s thyroiditis and Graves’ disease: A practical guide. Medicine Today.
https://endocrinology.medicinetoday.com.au/et/2025/may/feature-article/differentiating-hashimotos-thyroiditis-and-graves-disease-practical-guide - StatPearls (2024). Hashimoto Thyroiditis.
https://www.ncbi.nlm.nih.gov/books/NBK459262/ - Santos, C. S., et al. (2025). Nutritional interventions in the treatment of Hashimoto’s disease: A systematic review.
https://www.wjgnet.com/2308-3840/full/v13/i1/100523.htm - Danailova, Y., et al. (2022). Nutritional Management of Thyroiditis of Hashimoto. Nutrients.
https://pmc.ncbi.nlm.nih.gov/articles/PMC9101513/ - Osowiecka, K., et al. (2023). The Influence of Nutritional Intervention in the Treatment of Hashimoto’s Thyroiditis—A Systematic Review.
https://www.mdpi.com/2072-6643/15/4/1041 - Dittfeld, A., et al. (2016). A possible link between the Epstein-Barr virus infection and autoimmune thyroid disorders.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5099387/ - Wang, Z., et al. (2025). Epstein–Barr virus in thyroid disease: an integrated immunovirological perspective.
https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1687214/full
