heard on the cbc last night and found the article to link to here:
Boost vitamin D supplements: Canadian Cancer Society
"We're recommending 1,000 IUs daily because the current evidence suggests this amount will help reduce cancer risk with the least potential for harm," said Heather Logan, the society's director of cancer control policy.
"More research is needed to clearly define the amount of Vitamin D that will maximize health benefits."
As more evidence on vitamin D becomes available, the society plans to update its recommendations.
Also Friday, a study published in the American Journal of Clinical Nutrition showed a 60- to 77-per-cent drop in cancer rates among postmenopausal women who took vitamin D combined with calcium, compared with a placebo.