Lactose intolerance can be diagnosed with a breath test that measures the amount of hydrogen in the exhaled breath after consuming a meal containing lactose.
Treatment of lactose intolerance is based on avoiding or limiting the amount of lactose in the diet. There is a wide range of lactose-free or low-lactose products available.
Regular cow's milk contains about 4-5% lactose. The lactose content can vary slightly depending on the type of milk and the processing method.
The effects of lactose can appear from 30 minutes to two hours after consumption. The duration and severity of symptoms depend on the