chippie
Well-known member
There is a difference between pasteurized and ultra pasteurized. It is not supposed to affect the nutritional value.
In pasteurization, milk is heated to a temperature of 161°F for 15–20 seconds, then quickly chilled to 40°F or lower. The target temperature for pasteurization is below the boiling point of milk because milk will curdle if it boils.
The label “ultra pasteurized” also appears frequently in the dairy aisle, primarily on cartons of heavy cream and half and half. These products are subject to an ultra high temperature (UHT) pasteurization process where they are heated to at least 275°F for a very short period of time. Ultra pasteurized dairy products (the process is used for many products, including juices, etc.) have a much longer shelf life than their pasteurized counterparts because the process eliminates a much larger percentage of bacteria than regular pasteurization does.