Cow's milk is a good source of protein and calcium, as well as nutrients including vitamin B12 and iodine. It also contains magnesium, which is important for bone development and muscle function, and whey and casein, which have been found to play a role in lowering blood pressure.

What is the nutritional importance of milk?

The Bottom Line

It's packed with important nutrients like calcium, phosphorus, B vitamins, potassium and vitamin D. Plus, it's an excellent source of protein. Drinking milk and dairy products may prevent osteoporosis and bone fractures and even help you maintain a healthy weight.

Is milk really nutritious?

Milk is a nutrient powerhouse. An 8-ounce glass has 8 grams of complete protein (the same as an egg) and 300 mg of calcium, about one-third of your recommended amount. Plus, it's naturally-occurring and not added as a supplement. Milk is also especially rich in vitamin B12 and potassium.