Cancer News Network: Calcium protects people from colorectal cancer

Wednesday, January 17, 2007

Calcium protects people from colorectal cancer

NUTRAingredients.com: The potential protective effects of calcium supplements against colorectal cancer may carry on for five years after people stop taking the supplements, research has revealed.

The Calcium Follow-up Study, an observational study that followed the Calcium Polyp Prevention Study, found that people from the original calcium supplementation group had a significant 12 per cent lower risk of any adenoma five years after the original supplements were stopped, compared to people from the placebo group.

“The protective effect of calcium supplementation on risk of colorectal adenoma recurrence extends up to five years after cessation, even in the absence of continued supplementation,” wrote lead author Maria Grau from Dartmouth Medical School in the US.

Colorectal cancer accounts for nine per cent of new cancer cases every year worldwide. The highest incidence rates are in the developed world, while Asia and Africa have the lowest incidence rates. It remains one of the most curable cancers if diagnosis is made early.

In the Calcium Polyp Prevention Study, 930 people with a recent adenoma were randomly assigned to receive four years of daily 1200-milligram calcium supplements or a placebo. The study revealed that those assigned to calcium supplements had a 17 per cent lower relative risk of an adenoma recurrence than those who got the placebo.

The new research, published in the Journal of the National Cancer Institute, used data on 822 of the original 930 subjects from the Calcium Polyp Prevention Study. Of these subjects, 597 underwent at least one colonoscopy exam, and completed follow-up questionnaires.

2 Comments:

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