A Problem with Milk

Vitamin D routinely added by dairies usually goes in at the wrong dosage

NO ONE KNEW WHY EIGHT PATIENTS ENTERED NEW England hospitals with vitamin D overdoses, but researchers wanted to find out. Too little of this crucial vitamin can lead to bone weakness and rickets, the deforming of bones in growing children. That's why D, found naturally in only a few foods (including the seriously disgusting cod liver oil), has been routinely added to milk since the 1930s. But too much of the vitamin is no bonus; the symptoms range from fatigue to urinary-tract stones to kidney malfunction -- and, in infants, the condition known as "failure to thrive," which can lead to...

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