Humans ingest an average of 50 milligrams of Arsenic a day, 80% of this comes from Meat, Fish, Poultry and Crop grown products; the other 20% comes from drinking water. Cigarettes contain approximately 0.8 micrograms of arsenic per pack (0.04 micrograms per cigarette). Two basic forms of arsenic exist; organic and inorganic. Inorganic arsenic is more poisonous than organic, and is present in cigarettes, drinking water and crops grown in the USA. The same amount of arsenic is present in crops as is in cigarettes. The reason behind this is that farmers used arsenic for pesticides, and the soil still contains this compound which is then filtered into drinking water supplies or into the plants themselves. Tobacco itself does not contain arsenic, it is a left over from pesticides still present in the soil. The full answer to your question (once you understand how it got there) is; Arsenic in tobacco effects you the same way as the arsenic in corn, too much will kill you (corn or tobacco).
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