Add all the ingredients to a blender and blend!
Keep left-over smoothie in the fridge a glass jar with a lid for up to 24 hours.
For a more 'green' smoothie replace the blueberries with 1/2 avocado and a thumbnail slice of fresh, peeled ginger
For a more exotic, fruity smoothie, replace the celery, apple, blueberries, spinach and super green powder with frozen pineapple/mango and add coconut water or coconut milk.
Finally, for a chocolatey smoothie, replace the celery, apple and blueberries with 2 heaped tbsp of cacao powder and 1/2 avocado and a handful of frozen cherries. Top with 1/2 tablespoon of raw cacao nibs for an extra antioxidant boost!