Veel
calcium in de voeding verhoogt kans op prostaatkanker flink.*
Uit
een studie naar de resultaten van een 17 jarige studie blijkt dat hoge
dagelijkse inname van calcium de kans op prostaatkanker flink doet stijgen. Als
men per dag 2.000 mg calcium of meer uit de voeding binnen krijgt verdubbelt de
kans op prostaatkanker. Zuivelproducten verhogen het risico ook doch enkel door
de calcium inname, behalve (slag)room dat wel een duidelijk hoger risico geeft.
Inname van vitamine D en fosfor hebben geen enkele invloed.
High
Dietary Calcium Intake May Increase Prostate Cancer Risk
Men
with a high intake of dietary calcium are at greater risk of developing prostate
cancer, according to a study presented today during the American Association for
Cancer Research's 4th annual Frontiers in Cancer Prevention Research meeting in
Baltimore.
Researchers from the Division of Cancer Epidemiology and Genetics of the
National Cancer Institute (NCI) reviewed data from the Alpha-Tocopherol,
Beta-Carotene Cancer Prevention (ATBC) Study to evaluate the relation between
calcium, vitamin D, phosphorus as well as dairy products and occurrence of
prostate cancer. The current research was based on 17 years of follow-up and
1269 incident cases of prostate cancer.
Results showed that higher intakes of dietary calcium were associated with a
significant increase in prostate cancer risk - men who consumed more than 2000
mg of calcium per day nearly doubled their risk of developing prostate cancer.
While dairy product intake increased the risk of prostate cancer, no association
remained after controlling for calcium. With the exception of cream which showed
a significant trend toward an increased prostate cancer risk across intake
levels, other individual dairy products showed no association. Moreover, there
was no evidence of a link for intake of vitamin D or phosphorous.
“The results of our study suggest that high intakes of dietary calcium are
related to an increased risk of prostate cancer,” according to Panagiota
Mitrou, of the NCI and lead author of the study. “These results might explain
the positive association seen with dairy products in our and previous studies.
Further research should focus on how dietary calcium could affect prostate
cancer.”
The ATBC Study was a large prospective cancer prevention trial conducted by the
U.S. National Cancer Institute (NCI) and the National Public Health Institute of
Finland from 1985 to 1993. The purpose of the study was to determine whether
certain vitamin supplements would prevent cancer in a group of 29,133 male (aged
50 to 69) smokers in Finland. The trial ended in 1993, but ongoing follow-up of
the participants enables continued research into the causes and prevention of
multiple diseases, including cancer.
Founded in 1907, the American Association for Cancer Research is a professional
society of more than 24,000 laboratory, translational, and clinical scientists
engaged in all areas of cancer research in the United States and in more than 60
other countries. AACR's mission is to accelerate the prevention and cure of
cancer through research, education, communication, and advocacy. Its principal
activities include the publication of five major peer-reviewed scientific
journals: Cancer Research; Clinical Cancer Research; Molecular Cancer
Therapeutics; Molecular Cancer Research; and Cancer Epidemiology, Biomarkers
& Prevention. AACR's Annual Meetings attract nearly 16,000 participants who
share new and significant discoveries in the cancer field. Specialty meetings,
held throughout the year, focus on the latest developments in all areas of
cancer research. (November
2005)
