Popping up everywhere from juice bars to health food stores, wheatgrass is the latest ingredient to enter the limelight in the world of natural health. 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. However, many of its purported benefits have not yet been proven