01 - Add the spinach, cucumber, celery, apple, banana, lime juice, ginger, and chia seeds (if using) to a blender.
02 - Pour in the cold water or coconut water.
03 - Blend on high until completely smooth, about 1–2 minutes.
04 - Taste and adjust sweetness by adding a bit of honey or agave syrup if desired.
05 - Pour into glasses, garnish with fresh mint leaves, and serve immediately.