The excretion time of nicotine in the human body is determined according to the individual's smoking history and physical condition, but it usually takes several days or weeks. Therefore, it is unrealistic to excrete nicotine within 12 hours. However, the following steps can help speed up the elimination of nicotine from the body:
1. Adjust diet: Make tea, drink honey water, eat foods containing selenium, drink plenty of water and fresh fruits and vegetables, etc., to help clean the lungs and promote the excretion of nicotine in the body with urine.
2. Proper exercise: Exercise for more than half an hour every day, such as jogging, swimming, etc., to help the body metabolize and expel some toxins from the body.
3. Quit smoking as soon as possible: Long-term smokers should quit smoking as soon as possible to avoid respiratory diseases and lung cancer.
In addition, when smoking, nicotine will be excreted from the body along with breathing, coughing, expectoration, etc. Therefore, after quitting smoking, this process of excretion will gradually decrease.