Nicotine in the Blood Reaches Zero
The CDC describes blood nicotine falling to zero at about 24 hours when no other nicotine is being used.
What happens to your body 24 hours after quitting smoking
The CDC timeline says nicotine in the blood drops to zero about 24 hours after the last cigarette. That milestone does not apply in the same way if you are using nicotine replacement therapy, a nicotine pouch, an e-cigarette or another nicotine-containing product. Withdrawal and learned smoking cues can continue after nicotine has left the blood.
Health timelines are population-level guides. Individual recovery varies with smoking history, health and treatment. Review the general guidance from the CDC and NHS.
Frequently asked questions
Does zero nicotine mean withdrawal is over?
No. The brain and body still need time to adjust, and routine triggers can continue to produce cravings after nicotine has left the blood.
What if I use a nicotine patch or gum?
Those products intentionally provide nicotine, so this clearance milestone is different. Use stop-smoking medicines as directed by a clinician, pharmacist or the product instructions.