The toxicity of aluminium and its role in dementia

Aluminium is one of the most abundant elements in the earth's crust but most of it is locked away in minerals such as alumino-silicates. Free, biologically available aluminium is a relative rarity in natural ecosystems. In freshwaters, the metal is toxic to fish at the levels permitted in drinking water, although its bioavailabilty depends on pH and other compounds present.

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