The Surprising Cause of Melanoma (And No, it's Not Too Much Sun)

Posted By Dr. Mercola | November 20 2011 | 163,799 views

Story at-a-glance

• The rising rates of melanoma documented over the last three decades are not due to sun exposure as often stated; researchers instead believe they are due to an increase in diagnoses of non-cancerous lesions classified, misleadingly, as "stage 1 melanoma"
• Exposure to sunlight, particularly UVB, is protective against melanoma -- or rather, the vitamin D your body produces in response to UVB radiation is protective
• Optimizing your vitamin D levels through proper sun exposure or use of a safe tanning bed can reduce your risk of skin cancer and as many as 16 different types of cancer
• The sun is your best source of vitamin D because when you expose your skin to sunshine, your skin synthesizes vitamin D3 sulfate. This form of vitamin D is water-soluble and can travel freely in your bloodstream, unlike oral vitamin D3 supplements

http://articles.mercola.com/sites/articles/archive/2011/11/20/deadly-melanoma-not-due-vitamin-d-deficiency.aspx

As written in The Lancet:

"Paradoxically, outdoor workers have a decreased risk of melanoma compared with indoor workers, suggesting that chronic sunlight exposure can have a protective effect."

Vitamin D Helps Protect You Against Cancer

Vitamin D is a steroid hormone that influences virtually every cell in your body, and is easily one of nature's most potent cancer fighters. So I want to stress again that if you are shunning all sun exposure, you are missing out on this natural cancer protectio

• Some 600,000 cases of breast and colorectal cancers could be prevented each year if vitamin D levels among populations worldwide were increased, according to previous research by Dr. Garland and colleagues.
• 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.
• A large-scale, randomized, placebo-controlled study on vitamin D and cancer showed that vitamin D can cut overall cancer risk by as much as 60 percent. This was such groundbreaking news that the Canadian Cancer Society has actually begun endorsing the vitamin as a cancer-prevention therapy.
• Light-skinned women who had high amounts of long-term sun exposure had half the risk of developing advanced breast cancer (cancer that spreads beyond your breast) as women with lower amounts of regular sun exposure, according to a study in the American Journal of Epidemiology.
• 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.