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Results from adult studies of the effects of lactose malabsorption on calcium intake and bone mass have been conflicting. To examine these effects in children, researchers performed hydrogen breath testing after a lactose challenge in 76 children in Brazil (age range, 5–12 years). Forty-seven children (62%) had lactose malabsorption; half had at least one gastrointestinal symptom of lactose intolerance following the test. Only three children reported previous history of milk intolerance.
Data from two 24-hour dietary recalls showed no significant differences between lactose absorbers and malabsorbers in daily median intake of calories, milk, other dairy products, calcium from milk, or total calcium. None of the children drank soy milk or Lac…