Similar to the cabbage listed above, kale offers valuable and similar vitamins and minerals that can deactivate toxins in your liver cells. While the contents of kale and cabbage are similar, kale tends to offer far more nutritive value per serving, which makes kale a natural liver cleansing agent. Many people add fresh kale to a smoothie for flavor, fiber, and for the nutrients, so consider this option in the morning if you enjoy smoothies. In addition, you can add fresh kale to your salad to help add flavor and to make your meal healthier. Consider doing this daily for best results.