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Diagnosis of Lactase Deficiency/Lactose Maldigestion

You can identify, whether you are suffering from lactose maldigestion by signs and symptom post drinking milk or consuming dairy food items . Generally there are many tests. They are given below:

  • H2 Breath Test: Detection of H2 in the exhaled air as bacteria in the bowel use lactose generating hydrogen (H2). Confirmed by an increase in breath hydrogen of > 20 ppm(parts per million) after ingestion of 50 g lactose is diagnostic
  • Lactose Tolerance Test (LTT): Detection of reduced or missing rise in blood glucose. An abnormal LTT denotes failure of the blood glucose to rise thirty minutes after ingestion of a 50 g lactose load
  • Stool acidity test: Detection of stool pH as the fermenting of undigested lactose creates lactic acid and other acids that can be detected in a stool sample
  • New Tests: Genetic testing of blood or saliva.

Diagnosis of Lactose Intolerance

  • Lactose Challenge Test : Take 500 ml of Milk (25 grams of Lactose), ideally at home, followed by fasting till 1-3 hours. If you have symptoms such as abdominal pain, gas, cramps, bloating or diarrhea; you are likely to be lactose intolerant