Should We Worry About Metals and Brain Health?

There is ample evidence that heavy metals can poison the brain.

The brain’s blood-brain barrier (BBB), a densely packed layer of cells lining the interior of cerebral blood vessels, is capable of protecting brain tissue from viruses, bacteria, parasites, and many chemical toxins. But the BBB is not perfect: It is vulnerable to influxes of heavy metals such as lead, iron, copper, and mercury—molecules that represent […]

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