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Frequent
Sex May Reduce Prostate-Cancer Risk, Study
Shows
April
6 (Bloomberg) -- Frequent sexual activity
may reduce a man's risk of prostate cancer,
according to a study in the April 7 Journal
of the American Medical Association.
The
cancer risk in men who reported more than
20 monthly ejaculations was 33 percent less
than that of other men, the Harvard University
study showed. Elevated testosterone has been
tied to both a high sex drive and prostate
cancer, which had led scientists to propose
a link between cancer and sexual activity.
More
research may help determine how sex might
be protecting some men from prostate cancer,
the investigators said. The results shouldn't
be used to encourage intensified sexual activity,
defined as ejaculation from intercourse, masturbation
or during sleep, they said.
``Men
worry that by being very active, they may
put themselves at increased risk,'' said Michael
F. Leitzmann, the lead researcher now at the
National Cancer Institute. ``Looking at the
data in a little bit more detail, our findings
suggest that ejaculation may even be associated
with a slight decrease in prostate cancer
risk.''
Researchers
surveyed almost 30,000 health professionals,
1,449 of whom developed prostate cancer, and
found an active sex life wasn't linked to
a higher cancer risk in most men.
There
are several ways in which frequent ejaculations
may protect against prostate cancer, the researchers
said. The activity may flush out a buildup
of toxins in the prostate, lessen development
of tiny crystals linked to some cancers, and
improve the immune system's response to cancer,
Leitzmann said.
How
It May Work
Ejaculation
also may release psychological tension, quieting
central nervous system activity that may contribute
to prostate- cell division and cancer growth,
the researchers said.
The
scientists downplayed results showing frequent
ejaculation appeared to reduce cancer risk
because only 7 percent of men fell into the
group reporting the most activity and just
59 of them developed prostate cancer, Leitzmann
said in a telephone interview.
http://quote.bloomberg.com/apps/news?pid=10000103&sid=a7YEOfEr8X8Y&refer=us |
