Ways to preserve blueberries?

I was wondering which methods of preserving blueberries keep more vitamins and medicinal qualities in them? Or if anyone knew any good ways to preserve them?

You can't go wrong with a good pie.

Oh, I'm sorry, you said preserve, not consume.

Apparently, freeze-drying is the absolute best way to preserve all the nutritional value of the food being preserved. These could be rehydrated for food, or could be a part of an herbal tea blend.

A gentle solar dryer or other dessicator is probably the next best thing. I believe canning, as well as making fruit leather, require an amount of heat that does destroy some of the nutritional value.

I don't know what the absolute minimum safe temperature for canning is, but I suppose that it is possible to look into low-temperature canning, such that there's just enough heat to kill pathogens and microbes on the outside of the fruit, and so that when the berries and liquid cool, they vacuum-seal the jar.

Other than that, there are preserves, as jam or pie filling, but those are often a hot preparation, too.

I suppose if you froze the pies, they'd have to thaw before being devoured, so that would keep them a little longer...

-CK