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Health & Fit Higher levels of vitamin D may lower colon cancer risk

18:07  14 june  2018
18:07  14 june  2018 Source:   nbcnews.com

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Loading Please Wait. Higher Vitamin D Levels Lower Cancer Risk . Having a serum vitamin D level of at least 40 ng/mL reduces your risk for cancer by 67 percent compared to having a For very fair skinned individuals and those with photodermatitis, any sun exposure may be unwanted and they

New evidence suggests that vitamin D may help protect people from colorectal cancer Colorectal cancer is the third-most common cancer in the U.S., killing

Image: Pensive woman looking through window with feet up on desk in sunny home officeSunlight is the easiest way for the body to absorb vitamin D, but too much UV exposure can increase risk of skin cancer. © Provided by NBCU News Group, a division of NBCUniversal Media LLC Image: Pensive woman looking through window with feet up on desk in sunny home officeSunlight is the easiest way for the body to absorb vitamin D, but too much UV exposure can increase risk of skin cancer. Higher than currently recommended amounts of the 'sunshine vitamin' might offer protection against colorectal cancer.

Long touted for its role in keeping bones strong — vitamin D also may be important in preventing colon cancer.

New research from the American Cancer Society and other public health groups finds people with higher than recommended blood levels of vitamin D have a lower risk of developing colorectal cancer. The finding was particularly significant for women.

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The lowest colorectal cancer risk was found in people who had circulating vitamin D levels even higher However, the risk did not continue to decrease for the very highest levels of vitamin D She said, “What’s optimal for colorectal cancer may be different for what’s optimal for bone health.”

Does Vitamin D Really Protect Against Colorectal Cancer ? A particularly provocative finding of the study, McCullough says, is the relatively strong correlation between higher blood levels of vitamin D and lower risk of colorectal cancer in women.

The opposite may also be true: people with a vitamin D deficiency were found to have an increased risk for the disease.

The new research project combines data on more than 12,000 people in Europe, Asia and the U.S.

"Participants who had vitamin D levels that were higher than the recommended levels had a statistically significant 22 percent lower risk of colorectal cancer," said Marjorie McCullough, senior scientific director at the American Cancer Society.

But some outside experts say more research is needed before doctors recommend vitamin D supplements specifically for colon cancer prevention.

Dr. Zhaoping Li, director at the UCLA Center for Human Nutrition, said the research is informative, but does not prove increasing vitamin D levels would prevent colon cancer. Instead, "this gives us a good reason to invest time and effort to see whether vitamin D can have an impact on colon cancer incidence," said Li.

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New research finds people with higher than recommended blood levels of vitamin D have a lower risk of developing colorectal cancer . Higher than currently recommended amounts of the 'sunshine vitamin ' might offer protection against colorectal cancer .

Higher concentrations of vitamin D circulating in the bloodstream are linked to a lower risk of colorectal cancer , according to a large “Our study shows that having higher levels above bone-health ones are associated with lower colorectal cancer ,” said Stephanie Smith-Warner, a Harvard

"This is not the smoking gun," she said. Li was not involved with this latest American Cancer Society study.

Colorectal cancer is the third most common cancer and third leading cause of cancer-related deaths in the U.S. And there's been a worrisome rise in the number of younger adults diagnosed with the disease.

That's why the American Cancer Society recently lowered the recommended age to begin colorectal screening from 50 to age 45. It's one of the few cancers that can be prevented with screening tools like colonoscopy.

But could vitamin D be another path to prevention? Dietary guidelines suggest most adults get at least 600 international units (IU) of vitamin D a day. This new research finds even larger amounts would offer stronger protection against colorectal cancer. However, study authors warn there's a limit on the apparent benefit.

"It's worth noting that people who had the highest levels that we looked at did not continue to see a lower risk of colorectal cancer, so there does appear to be this sweet spot," said McCullough.

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Higher blood concentrations of vitamin D are linked to a lower risk of colorectal cancer , especially in women, according to a large new study from The study found that optimal levels of vitamin D for colon cancer prevention are higher than the current U.S. recommendation of 600 international units

Higher circulating levels of 25 hydroxyvitamin D (25[OH] D ) up to 100 nmol/L are associated with a significantly lower risk for colorectal cancer (CRC) in women and a nonsignificantly lower risk in men compared with concentrations that are considered deficient for bone health, an international

It's unclear where that sweet spot is, though.

True cancer prevention likely comes from multiple lifestyle changes: exercise, maintaining a healthy weight, not smoking and a healthy diet rich in fiber, as well as, yes, vitamin D.

Li almost always recommends at least 1,000 IU a day. She said there's emerging evidence that vitamin D not only regulates calcium for bone health — it also may impact the immune system and cell growth.

Sunlight is the easiest way for the body to absorb D, but of course too much UV light can increase the risk for skin cancer. Experts say casual exposure to the sun — a short walk down the street or running to catch a bus, for example — is generally sufficient.

Vitamin D is also found in a few foods: cod liver oil, fatty fish like salmon, tuna, egg yolks and fortified cereal, milk and orange juice.

Experts aren't suggesting everyone should rush to their doctors to get their vitamin D levels checked.

"People who are at higher risk of having lower levels are people who are never exposed to the sun, people who have dark skin who live in northern latitudes, and who don't eat the foods that are fortified by vitamin D and who don't like fatty fish," said McCullough.

The American Cancer Society predicts more than 140,000 people will be diagnosed with colorectal cancer this year, and more than 50,000 will die from the disease.

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