Protect Your DNA – Sami Anwar

Sami Anwar - As you age, the ends of your chromosomes -- called telomeres -- become shorter. This makes you more likely to get sick. But lifestyle changes can boost an enzyme that increases their length. Plus, studies show diet and exercise can protect them. The bottom line: Healthy habits may slow aging at the cellular level.

An 80-year study found that people who are conscientious -- meaning they pay attention to detail, think things through, and try to do what's right -- live longer. They do more things to protect their health and make choices that lead to stronger relationships and better careers.

Here's one more reason to be grateful for your friends -- they might help you live longer. Australian researchers found elderly social butterflies were less likely to die over a 10-year period compared to people with the fewest friends. A look at results from 148 more studies shows a clear link between social ties and a long life.

Your friends’ habits rub off on you, so look for buddies with healthy lifestyles. Your chances of becoming obese go up if you have a friend who adds extra pounds. Smoking also spreads through social ties, but the good news is that quitting is also contagious.

It's no secret that giving up cigarettes can lengthen your days, but the amount of extra time may surprise you. A 50-year British study shows that quitting at age 30 could increase your lifespan by an entire decade. Kicking the habit at age 40, 50, or 60 can add 9, 6, or 3 years to your life, respectively.

A siesta is standard in many parts of the world, and now there's scientific evidence that napping may help you live longer. A study that involved 24,000 people suggests those who have a regular snooze are 37% less likely to die from heart disease than those who rarely steal a few winks. Researchers think naps might help your heart by keeping stress hormones down.

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