the logic of the passage

[unpakwon]

The logic of the following passage in bold is confusing. Could you please paraphrase it in easy English?

Tests on counterfeit cigarettes found that they had on average five times as much cadmium as genuine cigarettes...... and then there's the elevated level of arsenic, which could cause cancer. You don't need to be told that smoking can kill you: but if you just bought 200 cigs, no questions asked, from a man in a bar, it probably just got a lot more dangerous.

Thank you.

[fromatto]

The logic of the following passage in bold is confusing. Could you please paraphrase it in easy English?

Tests on counterfeit cigarettes found that they had on average five times as much cadmium as genuine cigarettes...... and then there's the elevated level of arsenic, which could cause cancer. You don't need to be told that smoking can kill you: but if you just bought 200 cigs, no questions asked, from a man in a bar, it probably just got a lot more dangerous.

Thank you.

It is obvious that smoking can kill you: but, if you buy a box of 200 cigarettes from a stranger in a bar, without asking any questions about where he got them from (the idea is that he has obtained them illegally and that the cigarettes are probably counterfeit), then you are putting your life at great risk if you smoke them.

[unpakwon]

I see.

Thanks a million.