Iâ€™ve smoked for 12 years. Iâ€™m 24 years old, and have ALWAYS had a very high metabolism. My wife and I have decided to quit smoking together. My metabolic rate changing does not worry me. What I want to know is this. Seeing as I do have a high metabolism, does that mean nicotine is passed to receptors quicker, and adversely, does nicotine get removed from my bloodstream quicker? I suppose what Iâ€™m really interested in knowing is, after my final cigarette, will it take less than the average 72 hours for the nicotine in my body to be filtered out?