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Tolerate Lactose Intolerance

Dairy foods (and calcium) might not be totally off limits.

WebMD Feature

She doesn't know for sure, but Jacqueline Janotta thinks she may have been born lactose intolerant . Never fond of milk as a child, she rarely encountered lactose, the sugar found in milk and other dairy products.

So, it wasn't until she was away at college that her symptoms became regular and painful. "I went to school in Chicago. There was pizza everywhere, and every time I ate it, I'd be doubled over in pain," she recalls.

Janotta's physician father suspected lactose intolerance (LI), the inability to digest lactose, and suggested she take lactase, a pill version of the enzyme normally produced in the body to digest lactose. After taking the supplement the next time she ate pizza, she was symptom free. It worked.

By some estimates, 75% of adults suffer some degree of LI. The condition affects 90% of all Asians and half of all blacks and Hispanics. Among those of northwestern European origin, however, only 20% are affected. Symptoms include bloating, painful cramps, and diarrhea, which regularly appear within 15 to 30 minutes after eating dairy products.

Calcium Intake a Problem with LI

"With dairy products labeled as off-limits by many LI sufferers, they're cutting out the best sources of calcium in their diet," says Cecilia Pozo Fileti, R.D., a spokesperson for the American Dietetic Association.