date:Sep 18, 2012
nstitutes of Health estimates about 30 million Americans have lactose intolerance, the inability to digest a type of sugar in milk. The condition is more common in people of Asian, African, Native American or Mediterranean ethnicity, and, while not dangerous, it can cause nausea, bloating, gas and diarrhea. Milk allergy, an immune system reaction that can cause hives, eczema and wheezing, as well as digestive problems, is thought to affect 2% to 5% of babies, though many outgrow it by age 3, acc