Is it possible to tell if I'm a smoker by doing a blood test?
A nicotine test in the lab can assist a doctor figure out how much nicotine is in a person's system. A nicotine test determines the amount of nicotine in the body, as well as the chemicals it produces. It's usually accomplished by analyzing a sample of blood or urine. The test is used to determine whether or not a person smokes or uses other tobacco products. Nicotine is a substance found in cigarettes and other tobacco products that is highly addictive. The body breaks down nicotine and converts it to cotinine when a person smokes. When testing for nicotine usage, lab professionals check for a molecular byproduct called cotinine. When a person stops using nicotine, the levels of nicotine and cotinine in their blood can take up to two weeks to diminish. After that, it takes a few more weeks for the levels in the urine to diminish. A blood sample from a vein in the arm or a random urine sample will be taken for the nicotine test. A saliva sample or (rarely) a hair sample may be used.
A high amount of nicotine or cotinine in the blood implies active tobacco or nicotine product usage in general.
• A moderate concentration means the person hasn't used tobacco or nicotine in the last two to three weeks.
• Someone who does not use tobacco but has been exposed to ambient smoke may have a lower level.
• People who have not used tobacco or nicotine, have abstained from tobacco and nicotine for several weeks, or are not exposed to environmental smoke may have very low to undetectable quantities.
About one hour after inhalation, nicotine can be detected in the bloodstream. Nicotinine can be identified in the blood for up to 10 days after a person quits smoking, according to a 2017 study published by the University of Illinois College of Medicine. Although a blood test is an invasive technique, the most reliable way to detect nicotine usage is to measure cotinine in the blood. It's also the best way to figure out how much nicotine nonsmokers are exposed to. A nicotine test is usually performed for legal reasons, such as before starting a new job or when a court orders it. This test determines nicotine levels in the blood.