Manganese is a naturally occurring mineral found in rocks and soil. It can also be found due to underground pollution sources. It is a close relative to iron and is frequently found in iron-bearing waters. Manganese can be more annoying than its cousin iron. In low concentrations it can produce unsightly stains on everything it touches. When fabrics are washed in water containing manganese they are left with dark brown or black stains due to the oxidation of the mineral.

High ingestion exposure to manganese has been linked to issues with the nervous system that creates a syndrome similar to Parkinson. Young children absorb manganese quicker than adults so it is especially dangerous to pregnant women and pre-teens.

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