Dangerous effects of smoking

Which Twin Is the Smoker?

Maybe there is no fountain of youth, but there is a surefire way to make yourself look older. Smoking changes the skin, teeth, and hair in ways that can add years to your looks. It also affects everything from your fertility to the strength of your heart, lungs, and bones. Take a look at these side-by-side photos. Can you pick out the smoker? Check your pick and get a closer look on the next slide.

Tobacco's Tell-Tale Signs

Twin B smoked half a pack a day for 14 years, while her sister never smoked. The loose skin under her eyes is typical for smokers, according to Bahman Guyuron, MD, of Case Western Reserve University. It's one of several visible signs -- shown on the following slides -- that tobacco byproducts inside your body are harming your appearance. Twin B also got more sun, damaging her skin from the outside, too.

Damaged Teeth and Gums

Yellow teeth are one of the most notorious effects of long-term smoking, but the dental damage doesn't stop there. People who smoke tend to develop gum disease, persistent bad breath, and other oral hygiene problems. Smokers are twice as likely to lose teeth as nonsmokers.

How Quitting Improves Your Looks

Quitting smoking can improve your appearance. As blood flow gets better, your skin receives more oxygen and nutrients. This can help you develop a healthier complexion. If you stay tobacco-free, the stains on your fingers and nails will disappear. You may even notice your teeth getting whiter.

How Quitting Improves Your Health

In just 20 minutes, blood pressure and heart rate return to normal. Within 24 hours, your heart attack risk begins falling. In the first weeks after quitting, tiny cilia (seen here) start back to work sweeping irritants out of the lungs. Within a year, your risk of developing heart disease drops to half that of people who still smoke. And after 10 smoke-free years, you're no more likely to die of lung cancer than someone who never smoked.

Cigarette Stench

Quitting eliminates the pervasive smell of cigarettes on your breath and in your hair and clothes. This is unattractive to nonsmokers and carries health hazards, too. The odor means that the people around you are  exposed to tobacco toxins, sometimes called "third-hand smoke." These toxins can be especially harmful to small children.

Can You Quit?

Experts agree that giving up cigarettes is very difficult. But if you're telling yourself it's impossible, think again. While there are 45 million smokers in the U.S., there are at least 48 million former smokers. If 48 million people could quit, it is doable. Just keep in mind that most people have to try more than once, and only 4%-7% succeed without help. Ask your doctor which smoking-cessation strategies might be right for you.