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36 As the half-life of cotinine is 1220 hours, 2 it is likely that occasional users will have urinary cotinine levels similar to non-users only a few days after their latest use

But the idea is to catch young people before they become real smokers, which they tend to do in their later teens, if theyre going to at all

Because of the prevalence of cigarette use, many people may not consider that the nicotine they are ingesting may potentially react with other substances they are also consuming, which could create problematic side effects

A.MaY.YangL.et al

arXiv preprint arXiv:1804.02767 Bochkovskiy, A., Wang, C.-Y., Liao, H.-Y.M

The carboxyhemoglobin (HbCO) levels were measured by a blood gas system (Siemens Healthcare Diagnostics, Erlangen, German)