It's organic and a source of protein and fibre, potassium, zinc, iron, magnesium copper, vits C, E, K, amino acids. Nicknamed “liquid gold” one serving of wheatgrass is the rough equivalent of one and a half pounds of leafy green vegetables. Wheatgrass is an excellent source of minerals, boasting a wealth of magnesium, chlorophyll, calcium, copper, phosphorous, potassium, thiamin, riboflavin, niacin, pantothenic acid, iron, zinc, manganese and selenium. Wheatgrass is also a great source of protein and it exhibits a significant proportion of essential vitamins including A, B1, B2, B6, B9, C, E and K.