» They can be effectively used for body's natural detoxification process. Herbs such as Plantago psyllium seed, rhubarb juice powder, aloe vera, alfalfa juice, chlorella, carrot concentrate, and garlic can be used to cleanse the colon, improve digestion and food absorption, and boost your immune system. Some digestive disorders such as colitis, indigestion, peptic ulcers, and irritable bowel syndrome can be cured using the herbs.