Arsenic in Cigarette Smoke

Organic arsenic is less toxic than inorganic arsenic, and accounts for most of the arsenic humans are exposed to, primarily through food and water. Inorganic arsenic is a byproduct of smelting metals and was used in the past in chemicals that pressure-treated wood for outdoor use, though this has been phased out in recent years. Inorganic arsenic is present in mainstream tobacco smoke and presumably in sidestream smoke as well.

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