Evidence supporting the use of: Sea Lettuce
For the body system: Thyroid Gland

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Synopsis

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

Sea Lettuce (Ulva lactuca) has a history of traditional use in supporting thyroid health, primarily due to its content of iodine—a mineral essential for the synthesis of thyroid hormones. In various cultures, especially in coastal regions, edible seaweeds like Sea Lettuce have been consumed as dietary sources of iodine, which is critical for proper thyroid function. However, scientific studies specifically investigating Sea Lettuce's effect on thyroid health are limited. Most references to its use are based on its general nutrient profile, which includes not only iodine but also other minerals and vitamins. While the iodine content in Sea Lettuce can contribute to dietary intake, it is generally lower than in other seaweeds such as kelp. There is a lack of clinical trials or robust scientific validation directly linking Sea Lettuce consumption to improved thyroid function in humans. Therefore, its use for thyroid support is justified primarily by tradition rather than by solid scientific evidence. Caution is also warranted, as excessive iodine intake from seaweed can disrupt thyroid function in sensitive individuals. Overall, Sea Lettuce may support thyroid health as part of an iodine-rich diet, but its specific efficacy has not been conclusively demonstrated in scientific literature.

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