Lactose malabsorption and intolerance in Italians

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Abstract
Lactose malabsorption was assessed by the hydrogen breath test in 40 Italian patients with irritable bowel syndrome and 42 controls without abdominal disturbances. Sixty-five percent of patients were “low milk consumers” (0–250 ml milk per day) compared with 38% of controls (PPP<0.05). During a four-month lactose-free diet as the only treatment 7.5% of patients became symptomfree (and remained so for a further eight-month diet), 52.5% improved, and 40% showed no change.