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CHICAGO (Reuters) -
Smoking
not only can wrinkle the face and turn it yellow -- it can do the
same to the whole body, researchers reported on Monday.
The
study, published in the Archives of Dermatology, shows that smoking
affects the skin all over the body -- even skin protected from the
sun.
"We
examined non-facial skin that was protected from the sun, and found
that the total number of packs of cigarettes smoked per day and
the total years a person has smoked were linked with the amount
of skin damage a person experienced," Dr. Yolanda Helfrich of the
University of Michigan, who led the study, said in a statement.
"In
participants older than 65 years, smokers had significantly more
fine wrinkling than nonsmokers. Similar findings were seen in participants
aged 45 to 65 years," Helfrich's team added in their report. The
researchers tested 82 people, smokers and nonsmokers, taking pictures
of the inner right arms. They ranged in age from 22 to 91 and half
were smokers ndependent judges decided how wrinkled each person's
skin was.
When
skin is exposed to sunlight, notably the face, it becomes coarse,
wrinkled and discolored with a pale yellow tint, Helfrich's team
wrote.
Several
previous studies have found that cigarette smoking contributes to
premature skin aging as measured by facial wrinkles, the study said,
but little has been done to measure the aging of skin not exposed
to light.
The
report did not discuss the mechanism involved but previous research
has found that cigarette smoke, among other things, causes blood
vessels beneath the skin to constrict, reducing blood supply to
the skin.
Smoking
can also damage the connective tissue that supports both the skin
and the internal organs.
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