10. Allergies To Milk
Some people are just allergic to milk. But some people don't have a severe reaction. A little milk mixed with food is okay, but they can't drink too much milk because their bodies can't tolerate it.
Fortunately, for people who have a strong reaction to milk, they have many other options. Powdered soy milk is a good choice. You can also get it from Grandma's Country Foods.