Wheatgrass is prepared from the freshly sprouted leaves of the common wheat plant, Triticum aestivum. It can be grown and prepared at home or purchased in juice, powder or supplement form. Some claim it can do everything from detoxifying the liver to improving immune function.It helps in detoxification of the body. Wheatgrass fights infections and has anti-inflammatory properties. It purifies the blood, detoxifies the liver and cleanses the colon.