Vitamine
D tegen kanker.*
Extra
vitamine D geeft meer dan 30% minder kans op borst- en eierstokkanker volgens
een Amerikaanse studie onder 63 onderzoeken die de relatie tussen vitamine D
en kanker als doel hadden. De hoeveelheid vitamine D per dag zou dan 25 mcg
moeten zijn, hetgeen duidelijk binnen de veilige maximale hoeveelheid ligt.
Het bewijs is nogal veel betekenend doch er zullen nog nadere onderzoeken
nodig zijn, ook om de juiste hoeveelheden vitamine D te kunnen bepalen.
Large
Daily Dosage Of Vitamin D Lowers Risk Of Breast, Ovarian Cancers, Study Says
A
daily dosage of 1,000 international units of vitamin D can lower the risk of
developing breast and ovarian cancers by about one-third, according to a study
in the online edition of the American
Journal of Public Health,
the New
York Daily News
reports. Cedric Garland of the University
of California-San Diego Moores Cancer Center
and colleagues looked at 63 previous studies that examined the association
between vitamin D and cancer (Rose, New York Daily
News,
12/29/05). Out of the 63 studies, 13 involved research on breast cancer and
seven looked at ovarian cancer (Hope, Daily
Telegraph,
12/29/05). Garland said the previous studies found that the link between
vitamin D intake and a lower risk of cancer is as apparent as the link between
smoking and higher risk of lung cancer, Reuters
reports. He added that people should consider taking vitamin D supplements to
increase their daily intake to 1,000 international units, which is within National
Academy of Sciences'
safety guidelines (Reuters,
12/28/05). "Breast
cancer
will strike one in eight women. Early detection using mammography reduces
mortality rates by approximately 20%, but the use of vitamin D might prevent
this cancer in the first place," Garland said (Daily
Telegraph,
12/29/05). However, Colin Cooper of the United Kingdom's Institute
of Cancer Research
said more studies need to be conducted in order to verify the findings. Cooper
added, "If you look at any individual study, the evidence is really
suggestive, rather than providing absolute proof. ... They failed to provide
any mechanism for how low levels of vitamin D are actually linked to high
incidence of cancer" (BBC News,
12/28/05).
"Reprinted with permission from http://www.kaisernetwork.org.
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