A large portion of the population is lactose intolerant, but most people aren't aware of this fact. Lactose intolerance is usually associated with mild bloating and a subsequent need to drink milk, but some children react badly to milk and develop a more severe condition called milk protein allergy.

The most dangerous aspect of lactose intolerance is that it often develops between the ages of 1 and 6 years and can lead to many serious health issues if left untreated. The most common symptoms of lactose intolerance are abdominal pain, bloating, gas, and diarrhea. Long-term consequences of lactose intolerance include malnutrition and anemia.