How fast does grass grow?

One of the most popular claims about wheatgrass, and one that is frequently made by both supporters and retailers, is that a 30 ml shot of wheatgrass is as nutritionally valuable as a kilogram of green vegetables . This claim most likely originates from a statement commonly attributed to the "father of wheatgrass", Charles F Schnabel, who is alleged to have said that "Fifteen pounds of wheatgrass is equivalent to 350 pounds of the choicest vegetables" . However, 30 grams of cooked spinach and broccoli contains more of certain vitamins and minerals (including vitamin C, calcium and folic acid) than the equivalent amount of wheatgrass. Spinach and broccoli also contain fibre. A garden salad of the size commonly sold in fast food outlets contains vastly more of a range of nutrients than a 30 ml shot of wheatgrass; a kilogram of such vegetables is said to be beyond comparison.