Preheat oven to 425 degrees F.
Line a muffin pan with 12 paper muffin liners.
In a large bowl, whisk together the flour, protein powder, baking powder, baking soda and salt. Add the blueberries and lightly toss to coat the blueberries in the flour mixture.
In a separate bowl, whisk together the eggs, melted butter, Greek yogurt, sugar, orange juice and vanilla until very smooth.
Pour the wet ingredients into the large bowl with the flour and blueberry mixture. Use a rubber spatula to gently mix until the ingredients are combined and no streaks of flour remain. It is a very thick batter.
Use a 4-tablespoon capacity muffin scoop to fill 12 paper muffin liners.
Bake the muffins for 7 minutes at 425 degrees F. Without opening the oven door, lower the temperature to 350 degrees and continue baking for 3 minutes.
Rotate the muffin pan from front to back and continue to bake at 350 for 10-12 more minutes. The muffins should spring back when lightly touched on top when they are done.
Allow the muffins to cool in the pan for 5-10 minutes. They are delicious warm! Or cool completely on a wire rack for an additional 20 minutes.