High Dairy in Childhood
Linked with Cancer Risk
Children who consume high levels of diary products may
have a greater risk of developing colorectal cancer in
adulthood, study findings suggest.
Among nearly 5,000 individuals followed for an average
of 65 years, those who grew up in families reporting the
highest levels of dairy consumption -- nearly 2 cups per
day -- had close to three-times the risk of colorectal
cancer compared with those from families reporting the
lowest intake, Dr. Jolieke C. van der Pols and
colleagues report.
The level of milk consumption in the high-diary group
was similar to the estimated average daily intake of
children in the United States, van der Pols, of the
University of Queensland, Brisbane, Australia, and
colleagues noted.
Links between colorectal cancer risk and childhood
exposure to dairy products have not been previously
evaluated, the researchers said.
Using data from a study of weekly food consumption in
families living in England or Scotland from 1937 to
1939, the researchers estimated the daily dairy intake
ranged from less than half a cup at the lowest to nearly
2 cups at the highest. Nearly all, 94 percent, of the
diary produces came from drinking milk, they report in
the American Journal of Clinical Nutrition.
Among the 4,374 individuals still available for
follow-up between 1948 and 2005, the investigators
identified 35 registrations and 41 deaths from
colorectal cancer.
An increased risk of colorectal cancer among those who
consumed the highest amounts of dairy during childhood
was still seen after the investigators adjusted the data
for potentially influential factors such as meat, fruit,
and vegetable consumption; and socioeconomic status.
However, van der Pols' group cautions that more complete
life-course assessments comparing dairy intake with
related dietary and lifestyle factors must be completed
before definitive conclusions can be made for dairy
intake in childhood.
SOURCE: The American Journal of Clinical Nutrition,
December 2007.
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