Milk, produced by various mammals, naturally contains many nutrients including protein and lactose. But the natural vitamin and mineral content of it depends on the feed and the season. The average vitamin A content in milk for instance is 1200 IU/L. However, it varies from 600–1800 IU/L throughout the seasons due to changes in feed. To ensure added health impact, milk serves as an excellent carrier for vitamins and can be fortified according to national guidelines.
Fortification of milk can be done by using either oily or powder vitamins. The choice of the fortificant is dependent on the available equipment in the dairy. The right choice of product depends largely on the actual setup in each dairy and on the products to be fortified.