By smoking, you are at the same time creating ideal conditions for harmful bacteria to breed in your mouth and compromising your bodys natural defense mechanisms against these, same bacteria
They are determined on different levels depending on who is asked
In 1971, TV and radio channels banned cigarette ads and showed more anti-cigarette ads that would scare people with graphic images of the effects of tobacco, like people with permanent holes in their neck after contracting smoke-related throat cancer
Both alkaloid nicotine and harmala alkaloids are very addictive and give the human brain an artificial high
Sci Total Environ 128:2135 Abadin H, Ashizawa A, Stevens YW, Llados F, Diamond G, Sage G, Citra M, Quinones A, Bosch SJ, Swarts SG (2007) Toxicological profile for lead