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In addition to the health benefits, wheatgrass offers a number of nutrients that are essential as part of a balanced diet. Though low in calories, wheatgrass is a good source of protein. It is not, however, a complete protein. Like most plant-based foods, wheatgrass is an excellent source of fiber, which can help reduce blood glucose. Wheatgrass can also support healthy digestion and help people feel full for longer than they usually would. Wheatgrass is a good source of vitamins A, C, E, and K, and of vitamin B6, zinc, iron, selenium, and manganese.