Health

Test Your Longevity Quotient

There's another longevity test on the Web -- this one claims to be the "official and most accurate" and was developed by anti-aging physician Dr. Ronald Klatz.

Click to the World Health Network's Longevity Test to see how you would be categorized according to physical, chronological or functional age -- and what changes you need to make for longevity, given the best of circumstances.

Klatz, author of "Stopping the Clock" (WNH Books, Chicago, Ill.), says people age biologically and chronologically. Chronological age measures the amount of time that has gone by since birth. Most of us can distinguish an elderly person from a young person. We can even categorize what age range a person might fall into. But what about a person who is 65 but looks as if he's only 45? Or a person who is 80, but functions as well as a 60-year-old?

This is biological age or functional age; we all age biologically at different rates. Age changes affect different parts of our body at different times. These age changes occur in the DNA, tissues, organs and hormone levels, as well as in every component of the human body.