Do as your Mother say's and DON'T play with your food!
The Food Standards Agency (2008) state that Vitamin C is by far the most unstable Vitamin there is. If it's exposed to air and heat for too long, and if mixed with certain metals such as Copper and Iron, Vitamin C's structure is damaged and its benefits lost! They explain how the simple process of cutting or bruising fruit leads to the release of an enzyme resulting in the oxidation of Vitamin C, which could render it useless.
For an uncompromising, high biologically available source of Vitamin C, opt for Optimum Health Vitamin C chewable tablets.