The amount of cotinine in your urine will vary depending on the amount and frequency of nicotine use. On average, nicotine ...

Nicotine can be present in breast milk for a few hours after smoking or vaping. There are steps you can take to reduce your baby’s exposure to nicotine in breast milk. Nursing can provide many ...

And nicotine really is addictive. The dopamine it stimulates, particularly in a brain area called the nucleus accumbens, ...