25/05/2026
Today is World Thyroid Day so I thought I would highlight the key nutrional building blocks for optimal thyroid function.
Thyroid dysfunction can often occur as a result of nutritional deficiencies such as iodine, tyrosine, selenium, zinc, and iron, which are essential for the function of the thyroid. To support thyroid function, which includes the manufacture of thyroid hormones and the conversion of T4 to the active T3 hormone, we need the following nutrients daily:
IODINE
Essential for the production of thyroid hormones (along with tyrosine)
Good food sources: seafood, seaweed, kelp, kombu, nori, tuna, shrimp and prunes.
TYROSINE
An amino acid that is essential for the manufacture of thyroid hormones (along with iodine)
Good food sources: dairy foods, red meat, eggs, almonds, salmon, avocados, bananas.
SELENIUM
Is an essential component of the enzyme that converts T4 (thyroxine) to T3 (triiodothyronine the active thyroid hormone) in the liver.
Good food sources: Brazil nuts, salmon, chicken, brown rice, beef, spinach, and walnuts
ZINC
Involved in the production and conversion of thyroid hormones
Good food sources: oysters, beef, lamb, chicken, eggs, dairy, cashews, almonds, sesame seeds, pumpkin seeds, yogurt, mushrooms, spinach, kale, avocado, and almonds.
IRON
Iron is also very important in thyroid function as iron is involved with the production of TSH and the conversion of T4 to T3.
Good food sources: beef, lamb, pork, liver (haem sources = higher absorption) beetroot, leafy greens such as spinach and kale, beans, lentils, chickpeas, tofu, molasses, dried fruit (non-haem sources = lower absorption)
Feeding your thyroid with the nutrient building blocks is a great place to start when supporting your thyroid.