Truth: The body can adapt to tolerate more milk. Even people who have a hard time digesting lactose rarely show symptoms with a small serving, especially when the dairy is paired with a meal, says Dennis Savaino, PhD, a nutrition science professor at Purdue University who has been studying lactose digestion for more than 30 years. 'Every poison—or food—has a dose,' Savaiano says. 'With lactose or milk, there’s a dose that gives symptoms, and that’s usually more than a cup.' Drinking milk regularly can make your body more used to digesting lactose, even if you’ve shown signs of intolerance before, he says. If you’re a dairy lover with lactose intolerance, talk to your doctor about ways to safely dabble in dairy without causing stomach upset or other symptoms.