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nicotine test

 
 
Reply Sun 6 Nov, 2011 10:05 pm
how long will nicotine stay in your system?
 
Butrflynet
 
  3  
Reply Sun 6 Nov, 2011 10:19 pm
@conniesworld,
http://science.howstuffworks.com/nicotine2.htm

Quote:
Nicotine doesn't stick around your body for too long. It has a half-life of about 60 minutes, meaning that six hours after a cigarette, only about 0.031 mg of the 1 mg of nicotine you inhaled remains in your body.

How does your body get rid of nicotine? Here's the process:

About 80 percent of nicotine is broken down to cotinine by enzymes in your liver.

Nicotine is also metabolized in your lungs to cotinine and nicotine oxide.

Cotinine and other metabolites are excreted in your urine. Cotinine has a 24-hour half-life, so you can test whether or not someone has been smoking in the past day or two by screening his or her urine for cotinine.

The remaining nicotine is filtered from the blood by your kidneys and excreted in the urine.

Different people metabolize nicotine at different rates. Some people even have a genetic defect in the enzymes in their liver that break down nicotine, whereby the mutant enzyme is much less effective at metabolizing nicotine than the normal variant. If a person has this gene, their blood and brain nicotine levels stay higher for longer after smoking a cigarette. Normally, people keep smoking cigarettes throughout the day to maintain a steady level of nicotine in their bodies. Smokers with this gene usually end up smoking many fewer cigarettes, because they don't constantly need more nicotine.
0 Replies
 
haminai
 
  0  
Reply Tue 14 Jan, 2014 01:55 pm
@conniesworld,
3 days to several months, depending on how much you smoke, how long you’ve smoked, and what type of test is administered.
0 Replies
 
LeilaniWilson
 
  1  
Reply Sun 30 Nov, 2014 07:59 pm
@conniesworld,
Usually, nicotine is visible for about 1 to 3 days after the last use of a nicotine-containing product like cigarette or tobacco. But it also varies in the amount of nicotine used, and consider the age and individual's health as well.
0 Replies
 
 

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