Options: If you prefer less sweetness, use 1/2 cup of water in place of the orange juice and include a peeled orange instead. Or, try a 1/2 cup of orange juice and 1/2 cup of water.
When I first created this recipe, I made the first option in the notes and it was good, but the second time around I replaced the water and orange with orange juice and I really enjoyed the brightness of the juice in this smoothie.