Lactose intolerance is a common digestive disorder. It means your body can’t digest lactose, the sugar found in milk products. After eating foods with lactose, you may have nausea, cramps, bloating, gas or diarrhea.
Lactose intolerance is not serious bout can be quite uncomfortable. You can easily control it by changing your diet. You may not have to give up milk products entirely. Some people with lactose intolerance can eat yogurt or aged cheeses, like cheddar and Swiss, with no problem.
Lactose-reduced milk is widely available. And taking supplements that contain lactase – the enzyme that breaks down lactose in the intestines – can help you digest dairy foods. You can find lactase supplements at most grocery and drug stores.
–Source: U.S. Department of Health and Human Services