To this day, Green Monsters are one of my favourite drinks for glowing skin and increased energy. If you are newbie, feel free to start off with baby spinach since its taste is undetectable, but I encourage you to experiment with kale, romaine lettuce, or other leafy greens as well. Just be sure to use a sturdy high-speed blender that can handle the task of blending thick greens. If your blender is on the weaker side, stick with spinach as it blends more easily.