Studies Dispute Acrylamide-Cancer Link
French Fry Chemical Safe at Dietary Levels, Study Shows
Aug. 21, 2007 -- New research involving 100,000 women found no evidence of a
link between consumption of acrylamide, a chemical found in french fries and
other foods, and breast cancer.
The study was presented Tuesday in Boston at the 234th national meeting of
the American Chemical Society.
Acrylamide is produced naturally when foods including starchy foods are
exposed to high heat during cooking. The chemical is commonly found in
processed potato products such as french fries, breads, and cereals. It is also
present in coffee and cigarette smoke. In the U.S., 30% of calories consumed
contain acrylamide, according to the researchers.
The chemical made headlines in 2002 when Swedish researchers first reported
a possible link between acrylamide in foods and cancer. Soon after, the World
Health Organization (WHO) labeled acrylamide a “probable human carcinogen.”
But while acrylamide is known to promote cancer at very high doses in rats
and mice, none of the human studies reported to date have shown dietary levels
of the chemical to be cancer causing, epidemiologist Lorelei Mucci, ScD tells
Previous studies by Mucci and colleagues at Brigham and Women’s Hospital and
Harvard School of Public Health in Boston found no association between dietary
acrylamide and colon, rectal, bladder, and kidney cancers.
“The studies do not support a role for acrylamide in the promotion of cancer
at dietary levels,” Mucci says.
Acrylamide and Breast Cancer
Their latest research included close to 100,000 nurses in the U.S. followed
for two decades between 1980 and 2000.
Throughout the study, the women were asked to complete questionnaires
detailing their dietary habits, including the types of foods they ate and how
often they ate them. The answers were used to estimate each woman’s daily
Over 20 years of follow up, roughly 3,000 breast cancers were identified. No
significant difference in breast cancer incidence was seen between women who
reported high or low intakes of dietary acrylamide.
Mucci presented these findings, along with results from a similarly designed
study involving 43,000 Swedish women, in a symposium examining the health
effects of acrylamide.
She suggested several possible reasons why the animal studies have shown
acrylamide to be carcinogenic while the human studies have not.
Mice and rats in lab studies were exposed to acrylamide at levels that were
1,000 to 100,000 times higher than those found in the human diet, she says.
The Harvard researchers are also examining whether dietary acrylamide plays
a role in prostate cancer, and they hope to expand their research to examine
ovarian and endometrial cancers.
French Fries, Chips Not OK
American Cancer Society epidepiologist Victoria Stevens, PhD, calls the
human studies examining acrylamide and cancer reassuring, but she adds that it
is still a good idea to limit or avoid french fries, chips, and other high-fat
High-fat diets have been linked to obesity, and obesity is a known risk
factor for a number of cancers, including postmenopausal breast, colon, kidney,
and esophageal cancers.
“Acrylamide may not be the culprit, but other components of a fatty diet are
definitely not healthy,” she tells WebMD. “Eating a healthy diet and avoiding
obesity are important for reducing cancer risk.”