Health claims of Wheat grass juice.One of the most popular claims about wheat grass, and one that is frequently made by both supporters and retailers, is that a 30 ml shot of wheat grass is as nutritionally valuable as a kilogram of green vegetables.Proponents of wheat grass use claims that regular ingestion of the plant can improve the digestive system, prevent cancer, diabetes and heart disease, cure constipation, detoxify heavy metals from the bloodstream, cleanse the liver, prevent hair loss and help to make menopause more manageable. There is, however, no medical nor scientific evidence to support these claims, although there is a great deal of anecdotal evidence to that effect.