A Green Lemon is unripe yellow lemons. Adding lemon to a green smoothie gives the organs that remove toxins a good cleansing, something people can all use this time of year. Though they are used for many purposes, one of the primary uses is lemonade-making, which has several health benefits. Vitamin C present in Green lemon is vital for development and repair of body tissues. Its benefits include protection and repair of skin, blood vessels, bones, ligament, cartilage and teeth.