[qam1]

The black smokers seemed to more slowly metabolize, or break down, the nicotine from the cigarettes, leaving more of it in their blood than in young white smokers, the researchers found....

the blacks had more of a chemical in their blood called cotinine. Cotinine is produced when the body breaks down nicotine

HUH???

[Narcoleptic]

it takes a longer time to break down in blacks, leading to the higher blood levels of cotinine that stay higher in the body for a longer time