Hashimoto's is the most common autoimmune condition in women. Nutrition is one of the best tools available.
Hashimoto's is an autoimmune attack on the thyroid gland. Chronic inflammation, fatigue, weight gain, and irregular cycles are common. The foods you eat directly affect the inflammatory load on your immune system — and your thyroid.
How Hashimoto's Thyroiditis affects what you eat
Hashimoto's is an autoimmune inflammatory condition. The primary nutritional goal is reducing the inflammatory load while supporting thyroid hormone production. Gluten sensitivity is significantly more common in Hashimoto's patients than the general population. Selenium is required for thyroid hormone conversion. Iodine is important but can be counterproductive in excess. Fatigue is a constant companion — stable blood sugar reduces its severity.
What your body needs most
Required for converting T4 to the active T3 thyroid hormone. Brazil nuts are the most concentrated dietary source.
Required for thyroid hormone synthesis and immune regulation.
Required for thyroid peroxidase function. Deficiency worsens hypothyroid symptoms even on medication.
Deficiency is very common in autoimmune conditions and correlates with disease activity.
Anti-inflammatory. Reduce the immune overactivity attacking thyroid tissue.
Involved in thyroid hormone production and conversion. Commonly deficient.
Foods to eat more of
Most concentrated dietary selenium source. One nut covers your daily requirement.
Omega-3s directly reduce the autoimmune inflammatory activity in Hashimoto's.
Iron, magnesium, and antioxidants. Cooking reduces goitrogenic compounds.
Zinc + magnesium. Both involved in thyroid function.
Tyrosine (from protein) is a building block of thyroid hormone T3 and T4.
Antioxidants reduce the oxidative stress elevated in autoimmune conditions.
Foods to cut back
Molecular mimicry between gliadin and thyroid tissue is well-documented. Many Hashimoto's patients report symptom improvement on a gluten-free trial.
Goitrogens can interfere with iodine uptake in excess. Cooking largely neutralises this.
Increase systemic inflammation and intestinal permeability (leaky gut), which can worsen autoimmune activity.
Can interfere with thyroid medication absorption and iodine uptake in large amounts.
How your cycle interacts with Hashimoto's Thyroiditis
Hashimoto's frequently disrupts the menstrual cycle — causing irregular periods, heavier bleeding, or anovulatory cycles. Oli tracks your actual cycle data from Apple Health and adjusts targets accordingly.
Explore cycle nutrition →What Oli does automatically for you
Cycle tracking via Apple Health — Hashimoto's commonly causes irregular cycles.
Emphasises selenium, zinc, and iron in nutrient tracking.
Anti-inflammatory food suggestions throughout.
Stable blood sugar support — monitors carb quality and protein at meals.
Fatigue-aware via Whoop recovery data integration.
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Important: Hashimoto's requires medical management including thyroid hormone monitoring and, for many patients, levothyroxine medication. Always work with an endocrinologist or GP. Nutrition supports but does not replace medical treatment.