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Lack of Sunshine Causes One Million Deaths a Year |
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Health Benefits
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From Mercola.com - "The world's most popular natural health newsletter"
 If vitamin D3 levels among populations worldwide were increased, 600,000 cases
of breast and colorectal cancers could be prevented each year, according to
researchers from the Moores Cancer Center at the University of California, San
Diego (UCSD).
This includes nearly 150,000 cases of cancer that could be
prevented in the United States alone.
The researchers estimate that
250,000 cases of colorectal cancer and 350,000 cases of breast cancer could be
prevented worldwide by increasing intake of vitamin D3, particularly in
countries north of the equator.
The study examines the dose-response
relationship between vitamin D and cancer, and is the first to use satellite
measurements of sun and cloud cover in countries where blood serum levels of
vitamin D3 were also taken.
Serum vitamin D levels during the winter from
15 countries were combined, then applied to 177 countries to estimate the
average serum level of a vitamin D metabolite among the population.
An
inverse association between serum vitamin D and the risk of colorectal and
breast cancers was found.
Protective effects began when 25-hydroxyvitamin
D levels (the main indicator of vitamin D status) ranged from 24 to 32 nanograms
per milliliter (ng/ml). In the United States, late winter 25-hydroxyvitamin D
levels ranged from 15 to 18 ng/ml.
Previous research has suggested that
raising levels to 55 ng/ml was actually optimal to prevent cancer, the
researchers said.
To increase your vitamin D3 levels, the researchers
recommended a combination of dietary methods, supplements and sunlight exposure
of about 10 to 15 minutes a day, with at least 40 percent of your skin exposed.
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