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By Serena Gordon
HealthDay Reporter
FRIDAY, May 14 (HealthDayNews) -- For years, health professionals
have been preaching that breast milk is best for baby. Now,
a new study says the benefits of breast-feeding may last well
past infancy and even affect your risk of heart disease.
The study found teenagers who'd been breast-fed as infants
had a lower ratio of bad to good cholesterol and lower levels
of C-reactive protein, a possible marker of heart disease, in
their blood than teens who had been fed formula as babies.
"What we've shown is that breast-feeding is a beneficial
risk factor for heart disease and stroke," said study author
Dr. Atul Singhal, deputy director of the MRC Childhood Nutrition
Research Center at the Institute for Child Health in London.
Singhal said that means "breast-feeding is not only good
for the short-term, but has a huge impact on long-term health
as well."
The new study appears in the May 15 issue of The Lancet.
Numerous studies have shown that breast-feeding is beneficial
for both baby and mother. Breast milk contains antibodies from
the mother that boost immunity in babies, making them less susceptible
to infections, allergies and asthma, according to the National
Women's Health Information Center. For mothers, breast-feeding
helps use up extra calories and may lower the risk of some cancers
later in life, research has found.
Between 1982 and 1985, babies born prematurely were recruited
from five different centers in the United Kingdom for two different
randomized studies on infant nutrition. One study compared breast
milk to pre-term formula, while the other compared regular infant
formula to pre-term formula that was sometimes supplemented
with breast milk.
For the new study, the researchers were able to follow up on
216 of the infants who were now between the ages of 13 and 16.
They tested the teens' blood to see if their early nutrition
had any effect on their current risk of heart disease.
The researchers found teens who had been fed breast milk had,
on average, a 14 percent lower ratio of LDL (bad cholesterol)
to HDL (good cholesterol). A lower ratio implies a lower risk
of heart disease, according to the researchers.
They also found levels of C-reactive protein were significantly
lower in teens who had been breast-fed as infants than those
who received formula. C-reactive protein is a marker of inflammation
and high levels are believed to be a warning sign for heart
disease.
Singhal thinks one of the reasons breast-feeding may lower
these heart-risk readings later in life is because breast-fed
babies grow more slowly. And that, he believes, affects long-term
cardiovascular health.
Dr. Michael Wasserman, a pediatrician at Ochsner Clinic Foundation
Hospital in New Orleans, called the study intriguing, adding
the research adds to "the whole host of arguments to already
be made for breast-feeding."
But, he cautioned, "it's a little bit difficult to say
that a four-week period predetermines so many aspects of the
biochemistry of your body."
Wasserman said the study had several limitations, chief among
them the small size of the sample. He added the study would
need to be replicated with a larger sample. Also, he said, the
researchers tried to account for factors such as weight, sex
and socioeconomic status, but there are a lot of other forces
that influence cholesterol levels, such as current diet.
He said pediatricians already recommend that any mother who
is able to should breast-feed. But if a woman can't or doesn't
want to breast-feed, that doesn't mean she's a bad mother, Wasserman
said. There's a lot of guilt associated with choosing not to
breast-feed or not being able to, he noted.
Singhal said breast-feeding is "obviously not the most
important factor in the development of heart disease, but it
is one of the ones you can do something about."

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