How to make homemade Vitamin C powder: Organic protection against synthetic attack

The title speaks for itself really but here are the five steps just for your convenience.
Ingredients
• Orange peels from 8 organic oranges
Preparation
1. Save the peels from about 8 oranges (you can store them in a sealed container in the refrigerator until you're ready to dry them). Leave the white pith intact, as it is full of vitamin C, as well.
2. Dry your peels. Tear the peels up into little pieces and dry them overnight in a dehydrator.
3. If you don't have a dehydrator, you can set them out where they won’t be disturbed, for about a week until they are completely dry.
4. You could also dry them in your oven on the lowest setting. This will be faster so keep checking them often. Once dry, use your blender or coffee grinder to mill them into a fine powder.
5. It should yield 2 cups. Store the powder in a small jar in the refrigerator personally I keep mine in dark glass bottles and out of direct light.