Many people might think the damage they have done by smoking is irreversible, a study done at the University of Wisconsin-Madison suggests otherwise when it comes to your arteries.
Smoking is a top cause of heart disease because it makes the arteries stiff so they have to work harder to pump blood throughout the body. Looking at 18 and 30 years old who smoked and found that after smoking only one cigarette the stiffness of arteries increased by 25%.