growth of other cells. When fibroblasts turn off, they
BIOLOGY OF AGING: RESEARCH TODAY FOR A HEALTHIER TOMORROW 19
FIBROBLA
TELOMERE LENGTH:
HEALTH SPAN VS. LIFESPAN?
STS PHO
Aging biologists are investigating
TO CREDIT
whether humans' telomere length
is associated with lifespan, health
: C
span, or both. In one study of people
OUR
age 85 years and older, researchers
TES
found telomere length was not
Y OF LEONARD HA
associated with longevity, at least not
in the oldest-old. In another study,