Cow's milk Pro: Hands down, cow's milk has the most calcium, and almost double the protein of any other type of milk. And because it comes in several types — whole, 2 percent, 1 percent or skim — that nutrition is accessible no matter which option is chosen. "It also has a more well-rounded nutritional profile," Gazzaniga-Moloo said. [Infographic: Milks Compared: How Do Milk Types Stack Up Nutritionally?] Con: Lactose intolerance affects a substantial number of Americans, causing abdominal…