Add all ingredients to a blender and mix on medium-high speed for about 2 minutes.
If it's a little too thick, add a little more milk or water to thin it out.
Divide between two glasses, top with more mixed berries, and enjoy!
Video
Notes
Using frozen ingredients will give you a thicker, more milkshake-like consistency. Using defrosted ingredients will make the consistency thinner, more like juice.
Use only certified or tested gluten free oats if you have an allergy or sensitivity!
For a vegetarian/vegan smoothie, omit the collagen.
If you have kidney issues or allergies to fish, shellfish, or eggs, omit the collagen.
For a lower-carb or lower sugar diet, omit the peaches and banana and substitute extra berries.
For a grain-free or Paleo smoothie, omit the oats.