Some saliva amount is taken from your mouth and mixed with cotinine , which shows the nicotine amount accurately staying in the saliva. Doctors confirmed that nicotine amount often remains in the saliva up to 11 hours and in heavy smokers, the nicotine amount can even stay for 4- 5 days in most cases.Feb 23, 2018
cotinine
Cotinine is an alkaloid found in tobacco and is also the predominant metabolite of nicotine. An anagram of the word "nicotine", it is used as a biomarker for exposure to tobacco smoke. Cotinine is currently being studied as a treatment for depression, PTSD, schizophrenia, Alzheimer's disease and Parkinson's disease.
https://en.wikipedia.org › wiki › Cotinine
How long does nicotine stay in your mouth after vaping?
Saliva: Nicotine and cotinine stay in saliva for about four days.
Does vape show up in saliva test?
The answer is no - there is no drug test specifically designed for vaping. However, this does not mean you will not test positive for the substances being tested. You have to understand that vaping is a delivery method of substances and not the substance itself.