Does the amount of vitamin c in orange juice change over time?

Answer 1

Heat actually preserves vitamin C if the temperature is below 70 degrees Celsius, because the high heat used kills the enzyme ascorbic acid oxidase, found in fruits and vegetables, before much Vit C is oxidized. Since this enzyme catalyzes the oxidation process, this is actually serve to protect the vitamin.. However, if the temperature rises above 70 degrees Celsius, then the vitamin C will be damaged. You can look here for more information: 1) http://www.madsci.org/posts/archives/1999-03/920691753.Ch.r.html 2)http://www.dietitian.com/vitaminc.html 3)http://www.selah.k12.wa.us/soar/sciproj2001/BryanT.html Note: For the second link, scroll down a little bit for the information.

Answer 2

Yes, this is usually due to the manufacturer adding additional vitamin C (in the form of ascorbic acid)

Answer 3

the level of vitamin C does not change at all it remains the same

Answer 4

the amount of vitamin c doesn't change overtime

Answer 5

it depends on the variety of fruit used in the juice and also what the juice:water ratio is.

Answer 6

no it doesnt because its wierd