if pasturasation destroys the vitamin c in milk, why do pasturised friut juices claim to be full of vit c?

Question

is this a lie?

Answer 1

Milk is not a great source of vitamin C, raw or pasteurized.

Fruit juices have ascorbic acid (vit. c) added to them to prevent browning and imporve flavor.

No, it's not a lie.

Answer 2

Pasteurisation does not kill any vitamins in milk. Pasteurization (or pasteurisation) is the process of heating food for the purpose of killing harmful organisms such as bacteria, viruses, protozoa, molds, and yeasts. The process was named after its inventor, French scientist Louis Pasteur. The first pasteurization test was completed by Pasteur and Claude Bernard on April 20, 1862.
But, unlike sterilization, pasteurization is not intended to kill all micro-organisms (pathogenic) in the food. Instead, pasteurization aims to achieve a "log reduction" in the number of viable organisms, reducing their number so they are unlikely to cause disease (assuming the pasteurized product is refrigerated and consumed before its expiration date).