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Smokers: Vitamin D Deficiency may Lead to Cancer

by Kathy Jones on March 19, 2013 at 9:09 PM
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 Smokers: Vitamin D Deficiency may Lead to Cancer

A new study has revealed that decreased levels of vitamin D may predispose smokers to developing tobacco-related cancer.

This study illustrates that simple vitamin D blood tests and supplements have the potential to improve smokers' health.

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Cigarette smoking is the primary causal factor for at least 30 percent of all cancer deaths, and can lead to multiple kinds of cancer, including bladder, cervical, esophageal, head and neck, kidney, liver, lung, pancreatic, and stomach, as well as myeloid leukemia.

In this new research, Afzal et al. measured plasma vitamin D levels in blood samples collected in 1981-1983 from 10,000 Danes from the general population. They then followed the study participants for up to 28 years through the Danish Cancer Registry.
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Of the participants, 1,081 eventually developed a tobacco-related cancer. The researchers determined that the median vitamin D concentration among these participants was only 14.8 ng/mL, versus the higher 16.4 ng/mL median concentration found for all participants together.

These results showed for the first time that the risk of tobacco-related cancers as a group is associated with lower concentrations of vitamin D.

The data also indicate that tobacco smoke chemicals may influence vitamin D metabolism and function, while vitamin D may conversely modify the carcinogenicity of tobacco smoke chemicals.

If further research confirms this, it would be consistent with previous studies demonstrating the anti-tumorigenic effects of vitamin D derivatives, as well as the correlation of vitamin D deficiency with favorable cancer-forming conditions and increased susceptibility to tobacco smoke carcinogens.

Interestingly, though, low vitamin D levels were not connected with risk of other cancer types.

"Our analyses show that the association between lower concentrations of plasma vitamin D and higher risk of cancer may be driven by tobacco-related cancer as a group, which has not been shown before," stated author Borge G. Nordestgaard, MD, DMSc.

"This is important for future studies investigating the association between plasma vitamin D and risk of cancer," he added.

The research has been published online in Clinical Chemistry, the journal of AACC.

Source: ANI
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