How do companies do tobacco test?

Companies typically conduct tobacco tests using methods such as urine, saliva, or blood tests to detect the presence of nicotine or its metabolites. These tests can identify recent tobacco use and may be employed for purposes like employee health assessments or insurance evaluations. The samples are analyzed in laboratories using techniques like gas chromatography or enzyme-linked immunosorbent assay (ELISA) to ensure accurate results. Additionally, some companies may use breath tests to measure carbon monoxide levels as an indirect indicator of tobacco use.