Nicotine is an addictive substance found in cigarettes and some vaping devices. Over time, continued nicotine use can lead to long-term brain changes. Nicotine is the active ingredient in tobacco, ...
The nicotine content in cigarettes varies significantly from brand to brand, but on average, a person absorbs 1–1.5 milligrams (mg) of nicotine from a cigarette stick. The above information comes from ...
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