Evidence supporting the use of: Bladderwrack (Kelp)
For the body system: Thyroid Gland

Links: Go back one page, Tool main page, Ingredients list, Health conditions list, Body systems list

Synopsis

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

Bladderwrack (Fucus vesiculosus), a type of kelp, has a long history of traditional use to support thyroid health, largely due to its naturally high iodine content. Iodine is an essential element required for the synthesis of thyroid hormones, and historically, iodine-rich seaweeds like bladderwrack were consumed to prevent or treat goiter, an enlargement of the thyroid gland caused by iodine deficiency. This traditional use is well-documented in European and Asian folk medicine.

Scientifically, while bladderwrack does contain significant levels of iodine, there are limited clinical studies directly evaluating its efficacy or safety for thyroid support in otherwise healthy individuals. Most modern thyroid dysfunctions in developed countries are not due to iodine deficiency, and excessive iodine intake can sometimes exacerbate thyroid problems. Regulatory and health organizations recommend caution with seaweed supplements for this reason. Overall, the use of bladderwrack for thyroid health is justified by tradition and its iodine content, but robust clinical evidence supporting its effectiveness or safety is lacking. Therefore, its use is primarily supported by historical precedent rather than strong scientific validation.

More about Bladderwrack (Kelp)
More about Thyroid Gland

Products containing Bladderwrack (Kelp)

We currently have no products on Vitabase that contain this ingredient.