Aging is an inevitable part of life. But while most of us expect to see the signs of aging in our fifties and sixties, things like wrinkles, gray hair, and a slower metabolism, others appear to age more quickly. And if your body begins to age faster than it should be, it's likely indicative that something is seriously amiss, either with your lifestyle, your environment, or perhaps your underlying health.
So, why do some people's body clocks start racing ahead of time, and what exactly are the warning signs your body is dealing with old age earlier than normal? Click on and browse this gallery for answers.