Introduction How long does nicotine stay in your system is a question many people ask out of curiosity, health concerns, or medical reasons. Nicotine is a chemical found in tobacco and many vaping products. Once it enters the body, it does not stay forever. The body begins breaking it down almost right away. Still, traces can remain for days or even weeks, depending on different factors. This guide explains everything in clear, simple words so anyone can understand how nicotine moves through the body and how long it can be detected. What Is Nicotine and Why Does It Matter Nicotine…