Barley Grass is one of the green grasses, the only vegetation on earth that can supply sole nutritional support from birth to old age. 30 Sachets: 3 pack of boxes, 10 each per box. The Barley Grass Powder contains all vitamins except vitamin D, most minerals (especially calcium). It’s best to take it on an empty stomach, either 20 minutes before a meal or 2 hours after. That will enable the nutrients to be assimilated easily without the presence of other foods. Make sure to use either cold or room temperature liquids, as hot liquid will break down the living enzymes in the Barley.