If vitamin A is added to milk, it must be at a minimum level of how many international units (I.U.) per quart?

The addition of vitamin A to milk is regulated to ensure that consumers receive adequate levels of this essential nutrient, which is important for vision, immune function, and skin health. The correct minimum level of vitamin A required in milk is set at 2000 international units (I.U.) per quart. This standard is in place to ensure that individuals who consume milk can obtain sufficient amounts of vitamin A in their diet, especially since milk is a common staple.

Health regulations typically establish minimum nutrient levels for fortified foods to address potential deficits in the population and to promote overall health. In this case, setting the level at 2000 I.U. aligns with nutritional guidelines aimed at providing consumers with the dietary intake necessary to fulfill their vitamin A needs effectively. The choice of this specific amount also reflects an understanding of average consumption patterns and dietary requirements.