How long is tobacco detectable in your body?
How long a drug is detectable in your blood or urine depends on a number of factors. It is influenced by how often and how much you use and your personal metabolism (the speed at which a substance is broken down by your liver, in particular). Drugs are longer detectable in your urine than in your blood.
Nicotine is broken down into cotinine in the body. After six hours, most of the nicotine is broken down. Cotinine can be detected in the urine up to two days after smoking. If people want to check whether you have smoked, they will be tested for cotinine.