Evidence supporting the use of: Norwegian Kelp
For the body system: Thyroid Gland

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Norwegian Kelp (Ascophyllum nodosum) is a rich natural source of iodine, a micronutrient essential for the synthesis of thyroid hormones (thyroxine/T4 and triiodothyronine/T3). The thyroid gland requires adequate iodine intake to produce these hormones, which are critical for regulating metabolism, growth, and development. Historical use of kelp and seaweed as dietary sources of iodine is well-documented, especially in coastal cultures. Scientific validation for kelp’s role in thyroid support is primarily due to its iodine content. Deficiency in dietary iodine is a known cause of hypothyroidism and goiter, and supplementation with iodine, including from kelp, can prevent or correct these issues. Multiple studies and public health guidelines recognize seaweed as a viable iodine source. However, there is limited clinical research specifically on Norwegian Kelp supplements for thyroid disorders, and excessive kelp intake can lead to iodine excess, potentially causing hyperthyroidism or thyroid dysfunction in sensitive individuals. Overall, the scientific justification for using Norwegian Kelp to support thyroid health is grounded in its iodine content, but dosage and individual health status must be considered. It is important to consult a healthcare provider before supplementing with kelp, especially for individuals with preexisting thyroid conditions.

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