Can you smell someones age?

A recent study found that people are able to smell old people:
"In a new study, blindfolded volunteers reliably recognized the aroma of
the elderly by sniffing sweat-soaked armpit pads, although they had a
much harder time correctly matching pads to the young and middle-aged,
and they were not able to make fine distinctions about age based on
scent alone. Contrary to the popular notion that old person smell is disagreeable,
volunteers in the new study rated the odors of the elderly as much less
unpleasant and intense than those of the middle-aged and young. Combined
with earlier research, the new findings suggest that people retain a
latent ability to gauge someone's age based on their odor, a talent
inherited from evolutionary ancestors that might be linked to the ways
animals recognize the sick and dying."

http://www.nature.com/news/old-person-smell-is-real-but-not-n...