No--the grapefruit is not green!

1 Grapefruit, peeled and seeds removed (reserve the juice that accumulates)
1 Large Sweet Apple, peeled and cored
2 cups Spinach, checked
1 Large Banana, previously sliced and frozen
2-3 Ice Cubes
½ cup Orange Juice or Water
1
Add all ingredients to a blender (including reserved grapefruit juice) and blend until creamy and smooth.
Ingredients
1 Grapefruit, peeled and seeds removed (reserve the juice that accumulates)
1 Large Sweet Apple, peeled and cored
2 cups Spinach, checked
1 Large Banana, previously sliced and frozen
2-3 Ice Cubes
½ cup Orange Juice or Water

What does reserved juice mean here? The drippings from peeling?
Yes, you will notice in the ingredient list it says to reserve juice.