Underactive Thyroid and Low Metabolism Linked to Longevity

A recent study of a population with high levels of longevity indicates that a common feature of the group is a slightly underactive thyroid.

An underactive thyroid is a condition that, until recently, seemingly required medical attention.  The study seems to indicate otherwise:

Researchers tested the levels of thyroid stimulating hormone (TSH) in 236 Ashkenazi Jews, who were about 100 years old, and their children, most of whom were in their 70s. For comparison with people not related by blood, they tested the TSH levels of the children's spouses.

The study found that the Ashkenazi centenarians had slightly elevated levels of TSH, which is a sign of mild hypothyroidism or an underactive thyroid. The centenarian's children also had slightly elevated levels of TSH, compared with that of their spouses.

Source: U.S. News and World Report

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