A serum nicotine or cotinine test measures nicotine and its primary metabolite, cotinine, in the blood to determine recent tobacco or nicotine product use (smoking, vaping, patches). It is highly accurate, often using LC-MS-MS, with cotinine levels serving as a reliable indicator due to its longer 24-hour half-life compared to nicotine's 2-hour half-life.
Diagnopein
Diagnopein
Diagnopein
Diagnopein
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