Green juice is a beverage made from the juices of green vegetables. There’s no official recipe, but common ingredients include celery, kale, Swiss chard, spinach, wheatgrass, cucumber, parsley, and mint. Given that green juice tends to taste bitter, most recipes add small quantities of fruit — which may or may not be green — to sweeten it and improve its overall palatability. Popular fruit options include apples, berries, kiwi, lemons, oranges, and grapefruit. Learn more from healthline