Dairy foods are a great source of calcium and some vitamins and minerals. But seek out the low fat versions for good health. Powdered milk has no fat, yet much calcium. Also, powdered milk has far fewer germs than pasteurized bottled milk.
Diets in Asia and other parts of the world are low in dairy products, yet those countries have large populations, mostly healthy if they have enough to eat.
In fact, many adults of Asian descent lack the enzymes needed to digest dairy foods. Often, milk and cheese, etc., are replaced by soy foods.
If soy milk is used in place of dairy milk, high calcium foods or supplements are needed in diet. Also, most purchased soy milk contains sweeteners, which is not good.