Quitting smoking helps your body eliminate toxins

48 hours after quitting smoking, carbon monoxide will be eliminated from the body. Lungs start to clear out mucus and other smoking debris.

Source: What happens when you quit? @ NHS Smokefree

Image by Challiyil Eswaramangalath Vipin from Chalakudy, India (cigarette.. like a cigarette in the rain) [CC-BY-SA-2.0], via Wikimedia Commons