Evidence supporting the use of: Knotted kelp
For the body system: Thyroid Gland

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Synopsis

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

Knotted kelp (Ascophyllum nodosum), like other seaweeds, is rich in iodine, an essential trace mineral required for the synthesis of thyroid hormones (thyroxine/T4 and triiodothyronine/T3). Iodine deficiency is a well-documented cause of hypothyroidism and goiter, and the inclusion of iodine-rich foods in the diet has historically been used to prevent and treat these conditions. Several scientific reviews and clinical guidelines confirm that dietary iodine intake is crucial for healthy thyroid function, and kelp is recognized as a potent natural source. However, excessive intake of kelp can lead to iodine toxicity and may disrupt thyroid activity, particularly in susceptible individuals or those with pre-existing thyroid disorders.

There is robust biochemical and epidemiological evidence supporting the use of iodine (including that from kelp) for maintaining thyroid health, but direct clinical trials using knotted kelp specifically are limited. Most evidence is extrapolated from studies on iodine supplementation in general or on other related seaweeds. Therefore, while the general scientific consensus supports the use of iodine-rich kelp for thyroid support, the strength of evidence specifically for knotted kelp is moderate, and caution is advised regarding dosage to avoid adverse effects.

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Products containing Knotted kelp

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