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What do Migraines, Raynaud’s, Carpal Tunnel and Arrhythmia Have in Common?

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People with several different types of disorders, such as migraine headaches, Raynaud’s Syndrome, Carpal Tunnel Syndrome and heart arrhythmia are likely to have something in common: low thyroid function. Two recent studies suggest why this may be so.

One study found that even a slightly underactive thyroid gland causes endothelial dysfunction. That is, it interferes with the function of cells lining blood vessels. These cells respond to hormonal cues that help blood vessels relax and contract; therefore, they are important for healthy blood pressure and normal blood flow.

Another study found that low thyroid function interferes with the body’s electrophysiology—the functions