More substantial than juice cleanses, the green smoothies are based with kale, spinach, and other leafy greens and are then mixed with various fruit combinations, which make the smoothies quite yummy, unlike their bright green appearance. The best part of the cleanse is that is not a starvation diet. In fact, it is encouraged that you snack between the smoothies when you are hungry. Some allowed snacks include crunchy vegetables like carrots, celery, cucumbers, apples, raw unsalted nuts, peanut butter, hard-boiled eggs, and plain greek yogurt.This adventure was said to be a challenge and one of the hardest things you can do.