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October 10 2001
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Calcium May Increase Prostate Cancer

 

Men who snack on milk, ice cream and cheese may have a greater risk of developing prostate cancer than their peers who consume less calcium from dairy products, according to researchers.

Their study of nearly 21,000 men found that those who consumed more than 600 milligrams (mg) of calcium daily from dairy products had a 32% higher risk of prostate cancer than men who consumed no more than 150 mg of calcium a day, over 11 years.

Each additional daily increase of 500 mg of calcium from dairy products was associated with a 16% increase in prostate cancer risk.

A high calcium intake, particularly from dairy products, may suppress blood levels of vitamin D. Besides serving as an important nutrient, vitamin D is a hormone that may protect against prostate cancer by preventing the proliferation of prostate cancer cells.

American Journal of Clinical Nutrition 2001;74:549-554



Dr. Mercola Dr. Mercola's Comments:

This information was reviewed last year when it was presented at the Annual Meeting of the American Association for Cancer Research. Now it has been published in the literature. This is one example why reading this newsletter will keep you on top of the big health stories years before they break in the traditional media.

As I said last year, I am not surprised that milk has been found to be associated with another disease. However, I found it quite interesting that the researchers speculated that it was actually the calcium that may be contributing to the problem.

The researchers are concerned that the calcium in non-physiologic levels may impair the function of the enzyme that converts vitamin D to its active form 1,25 dihydroxyvitamin D.

This reaction occurs in the kidney and one can actually take a supplement of this active form of vitamin D, but it is a prescription (Rocaltrol) and is very expensive. Patients who have kidney failure need to take this supplement as their kidney's lose the ability to make this active form of vitamin D.

I find this observation a reassurance of my position that most of our supplements should be from food. When one attempts to force feed the body in what one "scientifically" determines to be valid, very delicate equilibriums can be upset and this can frequently lead to less than optimum health.

This study took place from 1984-1994. However, rBGH (Monsanto's bovine growth hormone) was not approved by the FDA until 1994. Therefore, this study only showed the effects of drinking non-rBGH milk. It is possible that rBGH milk could increase cancer risk even more, since the hormone has been shown to increase levels of IGF-1 in milk.

The book, Got (Genetically Engineered) Milk? The Monsanto rBGH/BST Milk Wars Handbook, by Samuel Epstein, is available as an eBook for only $5.81 at this website.

Related Articles:

Study Links Dairy Products to Prostate Cancer

Vegetables Lower Prostate Cancer Risk

Many People are Taking IGF-1 Without Even Knowing It

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