| The levels of nicotine and cotinine in amniotic fluid and cord blood were higher in the vitamin C-exposed group compared with the nicotine group for reasons that are unclear. |
| The authors say that cotinine is a poor biomarker of carcinogenic risk. |
| This study supports the use of cotinine as an appropriate marker for passive smoking. |
| High levels of cotinine, a byproduct of nicotine found in smoke, erode tooth enamel. |
| He found that children from smoking households had cotinine levels three times higher than those from non-smoking households. |
| This self report was corroborated by cotinine concentration in residual routine blood or saliva samples. |
