THE MEDICAL MERRY-GO-ROUND

Revealed: the pill that prevents cancer (Jeremy Laurance, The Independent, 12/28/05)

A daily dose of vitamin D could cut the risk of cancers of the breast, colon and ovary by up to a half, a 40-year review of research has found. The evidence for the protective effect of the "sunshine vitamin" is so overwhelming that urgent action must be taken by public health authorities to boost blood levels, say cancer specialists.

A growing body of evidence in recent years has shown that lack of vitamin D may have lethal effects. Heart disease, lung disease, cancer, diabetes, high blood pressure, schizophrenia and multiple sclerosis are among the conditions in which it is believed to play a vital role. The vitamin is also essential for bone health and protects against rickets in children and osteoporosis in the elderly. . . .

Countries around the world have begun to modify their warnings about the dangers of sunbathing, as a result of the growing research on vitamin D. The Association of Cancer Councils of Australia acknowledged this year for the first time that some exposure to the sun was healthy.

Australia is one of the world's sunniest countries and has among the highest rates of skin cancer. For three decades it has preached sun avoidance with its "slip, slap, slop" campaign to cover up and use sunscreen. But in a statement in March, the association said: "A balance is required between avoiding an increase in the risk of skin cancer and achieving enough ultraviolet radiation exposure to achieve adequate vitamin D levels." Bruce Armstrong, the professor of public health at Sydney University, said: " It is a revolution."

In the latest study, cancer specialists from the University of San Diego, California, led by Professor Cedric Garland, reviewed 63 scientific papers on the link between vitamin D and cancer published between 1966 and 2004. People living in the north-eastern US, where it is less sunny, and African Americans with darker skins were more likely to be deficient, researchers found. They also had higher cancer rates.

The researchers say their finding could explain why black Americans die sooner from cancer than whites, even after allowing for differences in income and access to care.

Do you ever suspect that modern Public Health is, at best, a wash?

Posted by David Cohen at December 28, 2005 8:51 AM