The Lactose Intolerance Test is a diagnostic test used to determine if an individual has difficulty digesting lactose, a type of sugar found in milk and dairy products. Lactose intolerance occurs when the body produces insufficient amounts of lactase, the enzyme needed to break down lactose in the small intestine.

During the test, the individual consumes a measured amount of lactose solution, typically diluted in water. Blood samples may be taken at specific intervals to measure blood sugar levels. Alternatively, the individual may be asked to collect breath samples at regular intervals to measure the levels of hydrogen gas produced by the fermentation of undigested lactose in the colon.

If the individual experiences symptoms such as bloating, gas, abdominal pain, or diarrhea, and/or exhibits abnormal changes in blood sugar levels or breath hydrogen levels after consuming the lactose solution, it suggests the presence of lactose intolerance.

The Lactose Intolerance Test is a valuable tool for diagnosing lactose intolerance and guiding treatment strategies, which often include dietary modifications to reduce lactose intake or the use of lactase supplements to aid in lactose digestion. By identifying lactose intolerance through testing, individuals can make informed choices about their diet and lifestyle to minimize symptoms and improve their overall quality of life.