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research-article |
Milk Intolerance Among Iranian School Children
Institute of Nutrition Sciences and Food Technology P.O. Box 3234, Tehran, Iran
The ability of 101 healthy children, ranging in age from 7 to 12 years, to tolerate milk, was investigated with regular lactose-containing and lactose-hydrolyzed milk in a double blind study. Twenty-five children, 12 milk intolerant and 13 tolerant, were tested for lactose tolerance (LTT) after ingestion of 4050 g of lactose. Fourteen (14%) of the subjects developed symptoms suggestive of milk intolerance after drinking regular milk, but none of the children complained of symptoms after consumption of lactose-hydrolyzed milk. Fifteen (60%) of 25 children tested for lactose tolerance (LTT) manifested clinical symptoms after ingestion of a test dose of lactose. Twenty (80%) of 25 subjects did not absorb lactose and had a flat blood glucose curve. However, the rate of lactose malabsorption in 7 to 10 and 11 to 12 year olds was 64% vs. 100% respectively.