Medically reviewed by Amelia MacIntyre, DO Nicotine quickly enters your bloodstream. Your liver then breaks down nicotine into several byproducts, primarily cotinine. Depending on what you're testing, ...

The number of young children sickened after getting their little hands on nicotine products like pouches and vape e-liquids has skyrocketed in recent years. From 2010 through 2023, U.S. poison centers ...