On which day after quitting smoking does the body start to detoxify from nicotine?

After quitting smoking, the exact time when the body begins to eliminate toxins varies among individuals, but generally speaking, the body starts to gradually break down and expel toxins starting from the first day of smoking cessation. Specifically, during the first three days after quitting smoking, the lung tissue begins to clear harmful substances such as accumulated nicotine and tar. These substances become encapsulated by mucus and are expelled from the respiratory tract through the movement of cilia in the lungs. As a result, smokers may experience symptoms such as coughing and phlegm production, and the sputum may contain blackish substances, which indicate the body's detoxification process. After quitting smoking, it is important to maintain a healthy lifestyle, including drinking plenty of water, increasing urination, consuming more fruits and vegetables, ensuring adequate nutrition, and engaging in regular physical exercise. These measures help promote the rapid elimination of toxins and support the body's recovery.