rapidmason71
Newcomer
4 messages
joined Jun 2008
When you're talking about smoking, you have to split things into two categories: nicotine, which is what gets you hooked, and the smoke—that nasty carcinogenic tar that actually causes lung cancer.
So, lung cancer doesn't come from the nicotine itself; it comes from that toxic tar (which is basically a massive cocktail of harmful chemicals). Nicotine is just the thing that keeps smokers reaching for another cigarette, dragging all that dangerous tar along for the ride.
It's well known that nicotine is a heavy-duty poison that can kill you in small doses, though you don't really run into it isolated like that in nature. But when people take in small amounts, the body adapts and builds an addiction. It’s kind of like arsenic—if you ingest tiny bits over time, your body starts building up a tolerance to the toxin.
Regarding your question about secondhand smoke and addiction, it really just boils down to the ratio: how much nicotine is the bystander inhaling versus how much of that carcinogenic tar they're breathing in.