Preheat the oven to 375°F. Grease a 12-cup muffin tin. Toss the fruit with 1/2 cup of the flour and set aside. Combine the flour, bran, baking powder, baking soda, and milk powder in a bowl. Stir with a whisk to combine and set aside.
In a separate bowl, mix the yogurt, apple juice concentrate, and vanilla. Mix the dry ingredients and yogurt mixture together. It will take a bit of effort, since the bran soaks up a lot of the available liquid. Fold in the egg whites. The batter is very
Divide the batter evenly among the prepared muffin cups. You can fill these to the brim; they won't ooze and end up on the bottom of your oven. Bake for 25 minutes, or until a cake tester inserted into the center of a muffin comes out clean.