Science: Milkman, Shade Those Bottles

Don't let milk stand in the sun. This advice was earnestly tendered recently by chemists of North Carolina State College. Their findings: bottled milk in the sun loses 40% of its vitamin 62 (riboflavin) in an hour, 72% in three hours. In the refrigerator or even in a dark room at room temperatures it loses none at all. Milk is the chief source of riboflavin in the U.S. diet.


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