By the way, doctor: Is it safe to take high doses of vitamin D?

On the basis of a blood test, my doctor wants me to take high doses of vitamin D for three months. I hear there are wide variations among laboratories performing these tests. Should I trust my first results, or take the test again? What are the risks?

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In the journals: Radio wave treatment is effective against Barrett’s esophagus

Barrett’s esophagus occurs when cells lining the lower esophagus are replaced by intestinal cells brought up by acid reflux. A new technique uses radio waves from an electromagnetic coil to kill the affected cells while leaving healthy cells undamaged.

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In Brief: Research backs cranberries for preventing urinary tract infections in women

An analysis of studies found that regular consumption of cranberry juice (or other cranberry products) helped reduce the likelihood of urinary tract infections in women who had a history of recurrent UTIs.

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