HERBAL EXTRACTS IN TOBACCO. “The list of 599 additives approved by the US Government for use in the manufacture of cigarettes is something every smoker should see. Submitted by the five major American cigarette companies to the Dept. of Health and Human Services in April of 1994, this list of ingredients had long been kept a secret.”
http://www.tricountycessation.org/tobaccofacts/Cigarette-Ingredients.html