by Dr. Mercola
Researchers have reported that a much higher intake of vitamin D is needed to reach blood levels that can prevent breast cancer and other major diseases than had been originally thought.
They found that daily intakes of vitamin D by adults in the range of 4000-8000 IU are needed to maintain blood levels of vitamin D metabolites in the range needed to reduce by about half the risk of breast cancer, colon cancer, multiple sclerosis, and type 1 diabetes. While an Institute of Medicine committee has stated that 4000 IU/day is a safe dosage, their recommended minimum daily intake is only 600 IU/day.
According to the study in the journal Anticancer Research:
“The supplemental dose ensuring that 97.5 percent of this population achieved a serum 25(OH)D of at least 40 ng/ml was 9,600 IU/d … Universal intake of up to 40,000 IU vitamin D per day is unlikely to result in vitamin D toxicity.”
Sources:
Anticancer Research 2011; 31(2)
Copyright Dr. Joseph Mercola, 2011. All Rights Reserved.
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