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A member asked:

Any possible way cotinine could be in a blood test, when the person did not smoke , or use any nicotine products, nor be exposed to second hand smoke?

A doctor has provided 1 answer

Yes: I recall a surprising test on pee of 2 week old babies from non-smoker homes who showed this byproduct in 15% of specimens. The only way it would have got there is second hand exposure.

Answered 5/11/2018

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How long is cotinine (nicotine) detectable in a blood or urine teat?

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I am having weight loss surgery and need to pass a nicotine test how long do I have to be smoke free for it to be undetected in my blood? Cotitine too

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If I am surrounded by secondhand smoke on a daily basis, will nicotine and cotinine show up in a cotinine urinalysis test?

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I am going to take a blood test soon and i was wondering since i smoke hookah pens without nicotine, will it show up?

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I have a cotinine test this Saturday. I smoke last Sunday. I quitted in November but occasionally sMoke. I am on nicotine gum 2mg. will it show.

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