Why Dairy or milk product are important for human body?

This first food of mammals is rich in body-building proteins and bone-forming calcium, besides being the only source of vitamin B₁₂ for the vegetarians. However, milk does not contain vitamin C, besides being deficient in iron. Dairy milk of varying fat contents is available in the market, the highest fat milk being known as jul1, fat milk, the next known as standard milk and the lowest is skim milk. Low fat dairy milk is better suited for adults, especially the ones who want to watch their weights and have a check on their cholesterol levels. Curds are an ideal substitute for people who have problem in digesting milk due to the deficiency of the enzyme lactase.