The studies revealed a significant association between high levels of vitamin D and a decreased risk of developing cardiovascular disease, type 2 diabetes, and metabolic syndrome.

All studies included were published between 1990 and 2009, with the majority published between 2004 and 2009. Half of the studies were conducted in the United States, eight were European, two studies were from Iran, three from Australasia and one from India.

Dr. Mercola's Comments:

Vitamin D, a steroid hormone that influences virtually every cell in your body, is easily one of nature’s most potent cancer fighters. Receptors that respond to vitamin D have been found in nearly every type of human cell, from your bones to your brain.

Your organs can convert the vitamin D in your bloodstream into calcitriol, which is the hormonal or activated version of vitamin D. Your organs then use it to repair damage, including that from cancer cells.

Vitamin D is actually able to enter cancer cells and trigger apoptosis or cancer cell death. When JoEllen Welsh, a researcher with the State University of New York at Albany, injected a potent form of vitamin D into human breast cancer cells, half of them shriveled up and died within days!

The vitamin D worked as well at killing cancer cells as the toxic breast cancer drug Tamoxifen, without any of the detrimental side effects and at a tiny fraction of the cost.

Many cancer treatments cost hundreds of thousands of dollars for a course of therapies and most are well in the five-figure cost range. You can actually get perfect vitamin D levels for free if you had access to sunshine in the sub tropics year round, but even if you purchased oral supplements, a year’s worth of treatment would be well under $100.

In mice, too, cancer tumors shrank by more than 50 percent, and some altogether disappeared, when vitamin D was injected.

These findings add to the growing knowledge that vitamin D is a key player in cancer treatment and prevention. If you want to see for yourself, you can browse through over 800 references showing vitamin D’s effectiveness for cancer here.

Cancer’s Silver Bullet?

Intake of vitamin D3 and calcium could potentially prevent 58,000 new cases of breast cancer and 49,000 new cases of colorectal cancer annually in the United States and Canada, according to a complex computer prediction model.

This model also predicted that 75 percent of deaths from these cancers could be prevented with adequate intake of vitamin D3 and calcium.

Theories linking vitamin D to certain cancers have been tested and confirmed in more than 200 epidemiological studies, and understanding of its physiological basis stems from more than 2,500 laboratory studies, according to epidemiologist Cedric Garland, DrPH, professor of family and preventive medicine at the UC San Diego School of Medicine.

Dr. Garland is widely regarded as the leading epidemiologist on vitamin D and its relation to health. He led one of the latest studies on vitamin D for cancer prevention and proposed a new model of cancer development -- dubbed DINOMIT-- that is centered on a loss of cancer cells' ability to stick together.

The model is a departure from the older model of cancer development, which centers on genetic mutations as the earliest driving forces behind cancer. According to Dr. Garland:

"The first event in cancer is loss of communication among cells due to, among other things, low vitamin D and calcium levels. In this new model, we propose that this loss may play a key role in cancer by disrupting the communication between cells that is essential to healthy cell turnover, allowing more aggressive cancer cells to take over."

Vitamin D May Help Prevent 2 Million Cancer Deaths a Year!

Earlier studies have shown that optimizing your vitamin D levels could help you to prevent at least 16 different types of cancer including pancreatic, lung, ovarian, prostate, and skin cancers. But now we’re starting to see more evidence that the type of cancer in question may not be all that important, because vitamin D appears to play a key role in the development of ALL types of cancer!

Vitamin D’s protective effect against cancer works in multiple ways, including:

• Increasing the self-destruction of mutated cells (which, if allowed to replicate, could lead to cancer)

• Reducing the spread and reproduction of cancer cells

• Causing cells to become differentiated (cancer cells often lack differentiation)

• Reducing the growth of new blood vessels from pre-existing ones, which is a step in the transition of dormant tumors turning cancerous

A study by Dr. William Grant, Ph.D., internationally recognized research scientist and vitamin D expert, found that about 30 percent of cancer deaths -- which amounts to 2 million worldwide and 200,000 in the United States -- could be prevented each year with higher levels of vitamin D!

How to Use Vitamin D to Lower Your Cancer Risk

Making sure that your vitamin D levels are optimized is one of the simplest, yet most profound, things you can do to protect your health. It will likely be many decades before health policy catches up to what the evidence has already revealed, and widespread recommendations for increased sunlight exposure and vitamin D levels become the norm.

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