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Higher Vitamin D Intakes Needed to Cut Breast & Colon Cancer, MS, Diabetes 1 Rates in Half

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www.ProHealth.com • February 22, 2011


“We 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 several diseases...” – Prof. C Garland, UC San Diego Moores Cancer Center

Researchers at the University of California, San Diego School of Medicine and Creighton University School of Medicine in Omaha report that markedly higher intakes of vitamin D than formerly thought are needed to reach blood levels that can prevent or markedly cut the incidence of breast cancer, colon cancer, and several other major diseases.

The report, “Vitamin D Supplement Doses and Serum 25-Hydroxyvitamin D in the Range Associated with Cancer Prevention,” was published Feb 21 by the journal Anticancer Research.

The researchers also point out that the higher-than-traditional daily vitamin D intake needs that their research suggests are largely deemed safe, as outlined in a December 2010 report by the National Academy of Sciences Institute of Medicine.(1)

“We 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 several diseases - breast cancer, colon cancer, multiple sclerosis, and type 1 diabetes,” says Cedric Garland, DrPH, professor of family and preventive medicine at UC San Diego Moores Cancer Center.

“I was surprised to find that the intakes required to maintain vitamin D status for disease prevention were so high – much higher than the minimal intake of vitamin D of 400 IU/day that was needed to defeat rickets in the 20th century.”

“I was not surprised by this” says co-author Robert P. Heaney, MD, of Creighton University, a distinguished biomedical scientist who has studied vitamin D need for several decades. “This result was what our dose-response studies predicted, but it took a study such as this, of people leading their everyday lives, to confirm it.”

The study reports on a survey of several thousand volunteers who were taking vitamin D supplements in the dosage range from 1000 to 10,000 IU/day. Blood studies were conducted to determine the level of 25-vitamin D – the form in which almost all vitamin D circulates in the blood.

• “Most scientists who are actively working with vitamin D now believe that 40 to 60 ng/ml is the appropriate target concentration of 25-vitamin D in the blood for preventing the major vitamin D-deficiency related diseases, and have joined in a letter on this topic,” says Garland.

• “Unfortunately, according a recent National Health and Nutrition Examination Survey, only 10% of the US population has levels in this range, mainly people who work outdoors.”

Interest in larger doses was spurred in December 2010, when a National Academy of Sciences Institute of Medicine committee identified 4000 IU/day of vitamin D as safe for everyday use by adults and children nine years and older, with intakes in the range of 1000-3000 IU/day for infants and children through age eight.
 
While the IOM committee states that 4000 IU/day is a safe dosage, the recommended minimum daily intake has been only 600 IU/day.

“Now that the results of this study are in, it will become common for almost every adult to take 4000 IU/day,” Garland says.

“This is comfortably under the 10,000 IU/day that the IOM Committee Report considers as the lower limit of risk, and the benefits are substantial,” he adds, emphasizing that people who may have contraindications should discuss their vitamin D needs with their family doctor.

“Now is the time for virtually everyone to take more vitamin D to help prevent some major types of cancer, several other serious illnesses, and fractures,” said Heaney. Other co-authors of the article were Leo Baggerly, PhD, and Christine French.

More facts are available from Anticancer Research (www.GrassrootsHealth.net).

_____

1. “Dietary Reference Intakes for Calcium and Vitamin D,” Nov 30, 2010.

Note: This information has not been evaluated by the FDA. It is for general information purposes only and is not meant to prevent, diagnose treat or cure any illness, condition or disease. It is very important that you make no change in your healthcare plan or health support regimen without researching and discussing it in collabora tion with your professional healthcare team.




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