Four bad habits that could shorten your life

The combination of four common bad habits - smoking, drinking too much, inactivity and poor diet - can age you by 12 years, new research suggests.

The findings are from a study that tracked nearly 5,000 British adults for 20 years, and they highlight yet another reason to adopt a healthier lifestyle.

Overall, 314 of those studied indulged in all four unhealthy behaviors. Of these, 91 died during the study, 29 percent. Among the 387 who abstained from all of the four habits, only 32 died, or about 8 percent.