The juice of barley grass contains beta-carotene, vitamins B1, B2, B6, B12, pantothenic acid, and folic acid. Minerals present include potassium, calcium, iron, phosphorus, and magnesium. Other constituents are chlorophyll, amino acids, protein, fiber, and enzymes. Look for Barley Grass grown in cold, deep soil for for the most pure and potent product.