Question: Sometimes I experience discomfort when I eat dairy, how do I know if I'm lactose intolerant? Answer: Lactose Intolerance or Lactase Deficiency. Classically, occurs in adolescents as lactase enzyme "peters out." More common in certain ethnicities: African, Asian. If a person does not have adequate enzyme to digest "milk sugar," fermentation of lactose occurs in the colon, potentially causing flatulence, cramps and diarrhea. Historically, the US government unwittingly caused