Some historians point out that the fall of the Roman Empire is to the metal “lead”. Romans had used lead materials in their food storage vessels and to line the channel used for transporting water. Since lead is a known neurotoxic that is proven to affect mental performance, researchers think that ancient Romans lost some of their mental capacities & abilities to make intelligent choices, thus causing their empire demise. Lead crosses the blood- brain barrier and can cause dementia and Alzheimer’s, and learning disabilities.
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