Your spit reveals your age, scientists say
The closer the examination the more, complex connections can be seen. I suspect DNA in all its expressions is linked to nearly every aspect of our lives and being. We are still so near the beginning of understanding ourselves. Even the notion of chronological age can be more closely considered. Is a 60 year old really 60 years old? What's there in that body that is 60 years old, the hair, fingernails, skin, bones? Nope, all that is replaced over and over again. Some things daily (red blood cells) some monthly, some yearly, some every few decades. From the show "The Body in Numbers", the best current estimate for an average overall age is 15.5 years.
This notion of an overall average age of the physical body impacts the notion of a bio-age as well. Seems to me a bio-age is meaningful only in relationship to lifespan and actual physical body age and as lifespan grow longer what it means to be biologically 50 years old shifts as well.
The expression "Your age" really needs more qualification to be any more then a very general marking. It seems to function as a real ink blot for reading in whatever you wish!
