When you ingest nicotine, it's absorbed into your bloodstream and then metabolized by your liver. The liver breaks down nicotine into cotinine, which is then excreted in your urine. It's a pretty efficient process, but it takes some time.
The amount of time it takes for nicotine to leave your system also depends on how much you've been using it. If you're a heavy smoker, it can take longer for nicotine to completely clear out. Additionally, your body weight and overall health can also affect the detox process.
Now, here's a fun fact: nicotine is highly addictive because it ffects the brain's reward system. It releases feel-good chemicals like dopamine, which can make you crave more. But don't worry, the cravings will pass, and your body will thank you for quitting.