Vitamin Supplements: Unregulated Risks and the Myth of unprescribed supplements

Vitamin Supplements: Unregulated Risks and the Myth of unprescribed supplements

Many thyroid supplements contain excessive and unregulated amounts of iodine, biotin, tyrosine, and even thyroid hormones, which can be harmful rather than beneficial. While iodine is essential for thyroid function, too much can trigger hyperthyroidism (Jod-Basedow phenomenon). The recommended daily intake is 150 μg (or 250 μg for pregnant/breastfeeding women), but some supplements contain dangerously high levels, such as 12,000 μg. Biotin, commonly found in hair and nail supplements, can interfere with thyroid lab tests, while tyrosine does not boost thyroid hormone production if levels are already sufficient. Iodine deficiency is rare in most individuals with a balanced diet, and those needing supplementation can safely obtain it from multivitamins rather than unreliable supplements. Many thyroid supplements also contain unpredictable amounts of actual thyroid hormone (T4), making them unsafe and unregulated. Therefore, thyroid supplements should be avoided, as they do not provide reliable treatment for thyroid conditions, and individuals with hypothyroidism should seek proper medical treatment instead.