A new study of
more than 44,000 women shows that being overweight boosts
a woman's risk of breast cancer, and the more weight
gained, the higher the risk, MSNBC.com reports. Women
who gain weight as adults are at a higher risk for all
types, stages, and grades of breast cancer, according
to the study in the journal Cancer.
The study shows
that women who gained more than 60 pounds as adults were
more than twice as likely to have ductal-type breast tumors
than women who gained 20 pounds or less. A weight gain
of 60 pounds or more increased the risk of
lobular-type cancers by 1.5 times. Women who gained
more than 60 pounds also were at three times greater risk of
developing breast cancer that spreads to other parts
of the body.
the American Cancer Society say that the increased body
weight may boost cancer risks because fat tissue produces
estrogen, which raises breast cancer risks.
data further illustrate the relationship between adult
weight gain and breast cancer, and the importance of
maintaining a healthy body weight throughout
adulthood," the researchers wrote in the journal.
Some studies have
shown that lesbians are at a higher risk of breast
cancer than heterosexual women. Researchers say one of the
reasons for this increased risk may be that lesbian
women tend to be heavier than their heterosexual
peers. (The Advocate)