5 Nutrients to Support Thyroid Health

5 Nutrients to Support Thyroid Health

The thyroid gland, a small butterfly-shaped organ nestled in our necks, plays a vital role in regulating our metabolism, growth, and development. Maintaining optimal thyroid function is crucial for overall health and well-being. Fortunately, scientific research has shed light on certain nutrients that can support thyroid function and help keep this essential gland in top shape. Join us as we explore the five most researched nutrients backed by scientific evidence that can be your allies in promoting thyroid health.


  1. Iodine: The Thyroid's Best Friend

Iodine is an elemental nutrient that forms the building blocks of thyroid hormones. Research shows that 35-40% of the population is deficient in iodine. Adequate iodine intake is vital for the production of thyroxine (T4) and triiodothyronine (T3), the hormones responsible for regulating metabolism. Research has repeatedly shown that iodine deficiency can lead to various thyroid disorders, such as goitre and hypothyroidism.

A study published in The New England Journal of Medicine highlighted the impact of iodine deficiency on thyroid health. It concluded that iodine supplementation effectively restored normal thyroid function in individuals with mild to moderate iodine deficiency.


  1. Selenium: An Antioxidant Warrior

Selenium, an essential trace mineral, acts as a potent antioxidant and is closely linked to thyroid health. It plays a crucial role in the conversion of T4 to the active form, T3, within our body. Additionally, selenium helps protect the thyroid gland from oxidative stress and inflammation.

A meta-analysis published in The Journal of Clinical Endocrinology & Metabolism reviewed several studies and concluded that selenium supplementation significantly improved thyroid function in patients with autoimmune thyroiditis, a condition characterised by inflammation of the thyroid gland.

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  1. Zinc: Thyroid's Metabolic Ally

Zinc is a vital mineral involved in numerous processes within the body, including thyroid hormone synthesis and metabolism. It is required for the activity of enzymes involved in converting T4 to T3. Research suggests that zinc deficiency can impair thyroid hormone production and lead to decreased thyroid function.

A randomised controlled trial conducted in Turkey investigated the effects of zinc supplementation on thyroid function. The results demonstrated that zinc supplementation significantly increased T3 and T4 levels, indicating improved thyroid function. Taking zinc in the form of picolinate has been shown to be the best, as it is easily absorbed into the body.

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  1. Vitamin D: Shedding Light on Thyroid Health

Vitamin D, often referred to as the "sunshine vitamin," is renowned for its role in bone health. However, emerging research suggests that it also plays a crucial role in thyroid function. Vitamin D receptors are present in the thyroid gland, suggesting a direct influence on thyroid hormone synthesis and metabolism.

A cross-sectional study published in the European Journal of Endocrinology found a significant association between vitamin D deficiency and autoimmune thyroid diseases. It suggested that maintaining optimal vitamin D levels might be important for supporting thyroid health and reducing the risk of thyroid disorders.

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  1. Omega-3 Fatty Acids: Inflammation Fighters

Omega-3 fatty acids, particularly EPA and DHA, are known for their anti-inflammatory properties. Chronic inflammation can disrupt thyroid function and contribute to autoimmune thyroid diseases.

A systematic review published in the Journal of Nutritional Biochemistry examined the effects of omega-3 supplementation on autoimmune thyroid diseases. The review indicated that omega-3 supplementation significantly reduced thyroid autoantibody levels and improved thyroid function in patients with autoimmune thyroiditis.


Nourishing your thyroid with the right nutrients can play an important role in supporting its function and overall health. While these five nutrients - iodine, selenium, zinc, vitamin D, and omega-3 fatty acids - have been extensively studied, it's essential to remember that individual nutritional needs may vary. Consult with a healthcare professional or a registered nutritional therapist to determine the optimal intake of these nutrients based on your specific requirements. Remember, a well-nourished thyroid sets the stage for a healthier you.