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Preservatives in Cigarettes
Ammonia

Ammonia causes rapid physiological absorption of nicotine from cigarette smoke. It also converts protonated nicotine into unprotonated nictoine. According to tobacco industry measurements, amending tobacco with additives such as ammonium carbonate and ammonia was found to increase nicotine transfer efficiency. One effect would be the enhancing in the reinforcing effect of cigarette smoke on the body

Menthol

Menthol has been suggested to make cigarettes more addicting than non-menthol cigarettes. "Nationally representative sample compared menthol and non-menthol smokers. Menthol smokers were found to have significantly higher serum cotinine levels" The nicotine interacts with nicotinic receptors all over the body. In some cases it was not shown that menthol was more addicting in different races, or ages. Menthol cigarettes make up 29% of cigarettes sold in the US.

A study byNicotine and Tobacco Research showed menthol cigarettes allows easier inhalation of the smoke to your lungs, it doesn't do any more harm than non-menthol cigarettes.

Menthol isn't just used for flavor, it is also used for a preservative in cigarettes. Menthol can have some drug like effects such as the production of a cooling, soothing sensation. It is put into medicinal medicines such as throat lozenges. Lawrence Carter said "Low doses of menthol in cigarette smoke can therefore reduce the painful and irritating effects on the lining of the nose, mouth and airways, thereby allowing smokers to inhale more easily."