Evidence supporting the use of: Chondrus
For the body system: Thyroid Gland

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Chondrus, commonly known as Irish moss (Chondrus crispus), has a long history of traditional use as a dietary supplement, particularly in coastal communities. It is rich in minerals such as iodine, which is essential for proper thyroid function. Historically, Chondrus and other seaweeds were consumed to prevent and treat goiter (an enlargement of the thyroid gland due to iodine deficiency) before the widespread iodization of salt. Folk medicine and herbal traditions often recommend sea moss for thyroid support based on its iodine content. However, direct scientific studies specifically validating Chondrus crispus for thyroid health are lacking, and most modern research focuses on iodine’s general role in thyroid hormone synthesis rather than on Chondrus itself. Therefore, while its use is grounded in tradition and supported by the known role of iodine in thyroid health, current evidence for Chondrus specifically is limited and indirect. Excessive iodine intake from seaweeds can also pose risks, so use should be approached cautiously. In summary, the rationale for using Chondrus to support the thyroid is primarily traditional, with moderate indirect support based on its iodine content, but not directly from robust clinical research on the species itself.

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