USDA dietary guidelines are driven by milk marketing concerns — not nutrition — lawsuit alleges

He said the inability to digest lactose, the primary carbohydrate in dairy, is prevalent among people of color — 95 percent of Asians, 60 to 80 percent of African Americans and Ashkenazi Jews, 80 to 100 percent of Native Americans and 50 to 80 percent of American Hispanics. For these people, consuming dairy causes diarrhea, pain and other, sometimes serious, digestive symptoms.