The National Dairy Council stated in its 2004 document "Milk's Unique Nutrient Package," published on the organization's website [vitamins and minerals bolded by ProCon.org for emphasis]:

“Milk contains nine essential nutrients, making one of the most nutrient-rich beverages you can enjoy… An 8-ounce serving of milk provides 30% of the Daily Value of calcium. Calcium helps build and maintain strong bones and teeth. This mineral also plays an important role in nerve function, muscle contraction and blood clotting. When fortified, a glass of milk provides about 25% of the Daily Value of vitamin D. Vitamin D helps promote the absorption of calcium and enhances bone mineralization…

The protein in milk is high quality, which means it contains all of the essential amino acids or ‘building blocks’ of protein. Protein builds and repairs muscle tissue, and serves as a source of energy during high-powered endurance exercise… Potassium regulates the body’s fluid balance and help maintain normal blood pressure…

A glass of milk provides 10% of the Daily Value of vitamin A. This nutrient helps maintain normal vision and skin… Vitamin B12 helps build red blood cells that carry oxygen from the lungs to working muscles… Milk is an excellent source of riboflavin, providing 24% of the Daily Value. Riboflavin, also known as B2, helps convert food into energy – a process crucial for exercising muscles.

Niacin is important for the normal function of many enzymes in the body, and is involved in the metabolism of sugars and fatty acids. A glass of milk contains 10% of the Daily Value for Niacin. Phosphorous helps strengthen bones and generates energy in your body’s cells. Providing 20% of the Daily Value, milk is an excellent source of phosphorous.”

2004