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Understanding Subclinical Hyperthyroidism and Natural Approaches to Support Thyroid Health

Subclinical hyperthyroidism is a condition characterized by a low or suppressed thyroid-stimulating hormone (TSH) level with normal levels of thyroid hormones (T3 and T4). This condition often presents without obvious symptoms of hyperthyroidism but can have significant implications for health if not monitored and addressed. Understanding the causes and exploring natural ways to support thyroid health can be beneficial for those managing this condition.

Causes of Subclinical Hyperthyroidism

  1. Graves' Disease: This autoimmune disorder causes the thyroid to become overactive.

  2. Nodular Thyroid Disease: Autonomous thyroid nodules can produce excess thyroid hormones.

  3. Thyroiditis: Inflammation of the thyroid, which may be transient.

  4. Excessive Thyroid Hormone Therapy: Overreplacement in patients being treated for hypothyroidism.

  5. Certain Medications: Drugs like amiodarone can affect thyroid function.

  6. Early Stage of Hyperthyroidism: It may be a precursor to overt hyperthyroidism.

According to Biondi and Cooper (2008), the clinical significance of subclinical thyroid dysfunction is substantial, as it can progress to overt thyroid disease if not monitored and managed properly .

Natural Approaches to Support Thyroid Health

While it's essential to follow medical advice when managing subclinical hyperthyroidism, some natural approaches can support overall thyroid health:

  1. Diet and Nutrition: Chaitow and Clarkson (2011) highlight the importance of nutritional solutions to better thyroid health, emphasizing balanced intake of these essential nutrients .

  • Selenium: This mineral, found in Brazil nuts, fish, and eggs, is essential for the conversion of T4 to T3, a crucial thyroid hormone.

  • Iodine: Necessary for thyroid hormone production. However, excessive iodine can worsen hyperthyroidism, so it's important to consult with a healthcare provider before increasing intake.

  • Zinc: Found in meat, shellfish, legumes, and seeds, zinc supports thyroid function.

  • Avoiding Goitrogens: Raw cruciferous vegetables (e.g., cabbage, broccoli) can interfere with thyroid function if consumed in large amounts.

  1. Stress Management: Chronic stress can negatively impact thyroid function. Techniques such as mindfulness, yoga, and meditation may help manage stress and support thyroid health.

  2. Regular Exercise: Engaging in moderate exercise can help regulate hormones and support overall health.

  3. Avoiding Excess Caffeine and Alcohol: These substances can interfere with thyroid function and overall hormonal balance.

  4. Herbal Supplements: Some herbs, such as ashwagandha and guggul, are thought to support thyroid health. Panda and Kar (1998) found that ashwagandha root extract can positively influence thyroid hormone concentrations . Similarly, Tripathi and Malhotra (1984) noted the thyroid-stimulating action of guggulsterone from Commiphora mukul .

  5. Regular Monitoring: Regular blood tests to monitor thyroid function and TSH levels are essential for managing the condition effectively.

Consulting a Healthcare Provider

It's crucial to consult with a doctor before making any changes to your diet, lifestyle, or supplement regimen, especially with subclinical hyperthyroidism. Your doctor can offer personalized guidance and monitor your thyroid function to prevent potential complications.

By combining medical treatment with natural approaches to support thyroid health, individuals with subclinical hyperthyroidism can manage their condition more effectively and maintain overall well-being.

For more detailed information, refer to recent literature on subclinical hyperthyroidism published in the Journal of Clinical Endocrinology & Metabolism and other reputable medical journals​​​​​​​​.


  1. Biondi, B., & Cooper, D. S. (2008). The clinical significance of subclinical thyroid dysfunction. Endocrine Reviews, 29(1), 76-131. DOI: 10.1210/er.2006-0043

  2. RACGP. Thyroid disease: Long term management of hyperthyroidism and hypothyroidism. RACGP

  3. Society for Endocrinology. Subclinical hyperthyroidism in pregnancy. Endocrine Abstracts (2023) 91 CB2. Society for Endocrinology

  4. American Thyroid Association. Treatment of subclinical hyperthyroidism in the elderly. American Thyroid Association

  5. Brownstein, D. (2006). Overcoming Thyroid Disorders.

  6. Mayo Clinic. Hyperthyroidism diet: Can certain foods help? Mayo Clinic

  7. Panda, S., & Kar, A. (1998). Changes in thyroid hormone concentrations after administration of ashwagandha root extract to adult male mice. Journal of Pharmacy and Pharmacology, 50(9), 1065-1068. DOI: 10.1211/0022357981771088

  8. Tripathi, Y. B., & Malhotra, O. P. (1984). Thyroid stimulating action of Z-guggulsterone obtained from Commiphora mukul. Planta Medica, 50(1), 78-80. DOI: 10.1055/s-2007-969632

  9. Subclinical hyperthyroidism. A clinical approach to subclinical hyperthyroidism. (2023). Endocrinology Today. Endocrinology Today

  10. Subclinical hyperthyroidism in pregnancy. (2023). Society for Endocrinology Endocrine Update. Society for Endocrinology

By Dr Purity Carr

GP & Menopause Doctor

Harvey, WA

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